Lech Poznań (Polish pronunciation: [lɛx ˈpɔznaj̃]) is a Polish professional football club based in Poznań and currently competing in the Ekstraklasa, the nation's highest division. The club is named after Lech, the legendary founder of the Polish nation.

Lech Poznań (Polish pronunciation: [lɛx ˈpɔznaj̃]) is a Polish professional football club based in Poznań and currently competing in the Ekstraklasa, the nation's highest division. The club is named after Lech, the legendary founder of the Polish nation.

The 2009 Checker O'Reilly Auto Parts 500 was the thirty-fifth and penultimate stock car race of the 2009 NASCAR Sprint Cup Series and the ninth in the ten-race season-ending Chase for the Sprint Cup. It was held on November 15, 2009, at Phoenix International Raceway, in Avondale, Arizona before a crowd of 90,000. The 312-lap race was won by Jimmie Johnson of the Hendrick Motorsports team after starting from third position. Jeff Burton finished second and Denny Hamlin placed third.

Martin Truex Jr. won the pole position, although he was passed by Kurt Busch by the end of the first lap. Fifty-six laps later, Johnson became the leader of the race. Many Chase for the Sprint Cup participants, including Jeff Gordon and Mark Martin ran in the top ten for most of the race. Johnson maintained the first position to lead the most laps of 238, and to win his seventh race of the season. There were four cautions and nine lead changes among four different drivers during the course of the race.

The 2009 Checker O'Reilly Auto Parts 500 was the thirty-fifth and penultimate stock car race of the 2009 NASCAR Sprint Cup Series and the ninth in the ten-race season-ending Chase for the Sprint Cup. It was held on November 15, 2009, at Phoenix International Raceway, in Avondale, Arizona before a crowd of 90,000. The 312-lap race was won by Jimmie Johnson of the Hendrick Motorsports team after starting from third position. Jeff Burton finished second and Denny Hamlin placed third.

Martin Truex Jr. won the pole position, although he was passed by Kurt Busch by the end of the first lap. Fifty-six laps later, Johnson became the leader of the race. Many Chase for the Sprint Cup participants, including Jeff Gordon and Mark Martin ran in the top ten for most of the race. Johnson maintained the first position to lead the most laps of 238, and to win his seventh race of the season. There were four cautions and nine lead changes among four different drivers during the course of the race.

The Wire is an American crime drama television series created and primarily written by author and former police reporter David Simon. The series was broadcast by the cable network HBO in the United States. The Wire premiered on June 2, 2002, and ended on March 9, 2008, comprising 60 episodes over five seasons. The idea for the show started out as a police drama loosely based on the experiences of his writing partner Ed Burns, a former homicide detective and public school teacher.

Set and produced in Baltimore, Maryland, The Wire introduces a different institution of the city and its relationship to law enforcement in each season, while retaining characters and advancing storylines from previous seasons. The five subjects are, in chronological order: the illegal drug trade, the port system, the city government and bureaucracy, education and schools, and the print news medium. Simon chose to set the show in Baltimore because of his familiarity with the city.

The large cast consists mainly of actors who are little known for their other roles, as well as numerous real-life Baltimore and Maryland figures in guest and recurring roles. Simon has said that despite its framing as a crime drama, the show is "really about the American city, and about how we live together. It's about how institutions have an effect on individuals. Whether one is a cop, a longshoreman, a drug dealer, a politician, a judge or a lawyer, all are ultimately compromised and must contend with whatever institution to which they are committed."

The Wire is an American crime drama television series created and primarily written by author and former police reporter David Simon. The series was broadcast by the cable network HBO in the United States. The Wire premiered on June 2, 2002, and ended on March 9, 2008, comprising 60 episodes over five seasons. The idea for the show started out as a police drama loosely based on the experiences of his writing partner Ed Burns, a former homicide detective and public school teacher.

Set and produced in Baltimore, Maryland, The Wire introduces a different institution of the city and its relationship to law enforcement in each season, while retaining characters and advancing storylines from previous seasons. The five subjects are, in chronological order: the illegal drug trade, the port system, the city government and bureaucracy, education and schools, and the print news medium. Simon chose to set the show in Baltimore because of his familiarity with the city.

The large cast consists mainly of actors who are little known for their other roles, as well as numerous real-life Baltimore and Maryland figures in guest and recurring roles. Simon has said that despite its framing as a crime drama, the show is "really about the American city, and about how we live together. It's about how institutions have an effect on individuals. Whether one is a cop, a longshoreman, a drug dealer, a politician, a judge or a lawyer, all are ultimately compromised and must contend with whatever institution to which they are committed."

The Boeing 747

Aviation is the activities surrounding mechanical flight and the aircraft industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as hot air balloons and airships.

The Boeing 747

Aviation is the activities surrounding mechanical flight and the aircraft industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as hot air balloons and airships.

Divers using the anchor cable as an aid to depth control during a decompression stop

The practice of decompression by divers comprises the planning and monitoring of the profile indicated by the algorithms or tables of the chosen decompression model, to allow asymptomatic and harmless release of excess inert gases dissolved in the tissues as a result of breathing at ambient pressures greater than surface atmospheric pressure, the equipment available and appropriate to the circumstances of the dive, and the procedures authorized for the equipment and profile to be used. There is a large range of options in all of these aspects.

Decompression may be continuous or staged, where the ascent is interrupted by stops at regular depth intervals, but the entire ascent is part of the decompression, and ascent rate can be critical to harmless elimination of inert gas. What is commonly known as no-decompression diving, or more accurately no-stop decompression, relies on limiting ascent rate for avoidance of excessive bubble formation. Staged decompression may include deep stops depending on the theoretical model used for calculating the ascent schedule. Omission of decompression theoretically required for a dive profile exposes the diver to significantly higher risk of symptomatic decompression sickness, and in severe cases, serious injury or death. The risk is related to the severity of exposure and the level of supersaturation of tissues in the diver. Procedures for emergency management of omitted decompression and symptomatic decompression sickness have been published. These procedures are generally effective, but vary in effectiveness from case to case.

Divers using the anchor cable as an aid to depth control during a decompression stop

The practice of decompression by divers comprises the planning and monitoring of the profile indicated by the algorithms or tables of the chosen decompression model, to allow asymptomatic and harmless release of excess inert gases dissolved in the tissues as a result of breathing at ambient pressures greater than surface atmospheric pressure, the equipment available and appropriate to the circumstances of the dive, and the procedures authorized for the equipment and profile to be used. There is a large range of options in all of these aspects.

Decompression may be continuous or staged, where the ascent is interrupted by stops at regular depth intervals, but the entire ascent is part of the decompression, and ascent rate can be critical to harmless elimination of inert gas. What is commonly known as no-decompression diving, or more accurately no-stop decompression, relies on limiting ascent rate for avoidance of excessive bubble formation. Staged decompression may include deep stops depending on the theoretical model used for calculating the ascent schedule. Omission of decompression theoretically required for a dive profile exposes the diver to significantly higher risk of symptomatic decompression sickness, and in severe cases, serious injury or death. The risk is related to the severity of exposure and the level of supersaturation of tissues in the diver. Procedures for emergency management of omitted decompression and symptomatic decompression sickness have been published. These procedures are generally effective, but vary in effectiveness from case to case.

Mercury rotates in a way that is unique in the Solar System. It is tidally locked with the Sun in a 3:2 spin–orbit resonance, meaning that relative to the fixed stars, it rotates on its axis exactly three times for every two revolutions it makes around the Sun. As seen from the Sun, in a frame of reference that rotates with the orbital motion, it appears to rotate only once every two Mercurian years. An observer on Mercury would therefore see only one day every two Mercurian years.

Mercury rotates in a way that is unique in the Solar System. It is tidally locked with the Sun in a 3:2 spin–orbit resonance, meaning that relative to the fixed stars, it rotates on its axis exactly three times for every two revolutions it makes around the Sun. As seen from the Sun, in a frame of reference that rotates with the orbital motion, it appears to rotate only once every two Mercurian years. An observer on Mercury would therefore see only one day every two Mercurian years.

Adelaide's O-Bahn was introduced in 1986 to service the city's rapidly expanding north-eastern suburbs, replacing an earlier plan for a tramway extension. The O-Bahn provides specially built track, combining elements of both bus and rail systems. Adelaide's track is 12 kilometres (7.5 mi) long and includes three interchanges at Klemzig, Paradise and Tea Tree Plaza. Interchanges allow buses to enter and exit the busway and to continue on suburban routes, avoiding the need for passengers to transfer to another bus to continue their journey. Buses can travel at a maximum speed of 100 km/h (60 mph), but are now restricted to 85 km/h (53 mph). , the busway carries approximately 31,000 people per weekday. An additional section including a 670-metre (2,200 ft) tunnel opened in 2017 at the city end to reduce the number of congested intersections buses must traverse to enter the Adelaide city centre.

Adelaide's O-Bahn was introduced in 1986 to service the city's rapidly expanding north-eastern suburbs, replacing an earlier plan for a tramway extension. The O-Bahn provides specially built track, combining elements of both bus and rail systems. Adelaide's track is 12 kilometres (7.5 mi) long and includes three interchanges at Klemzig, Paradise and Tea Tree Plaza. Interchanges allow buses to enter and exit the busway and to continue on suburban routes, avoiding the need for passengers to transfer to another bus to continue their journey. Buses can travel at a maximum speed of 100 km/h (60 mph), but are now restricted to 85 km/h (53 mph). , the busway carries approximately 31,000 people per weekday. An additional section including a 670-metre (2,200 ft) tunnel opened in 2017 at the city end to reduce the number of congested intersections buses must traverse to enter the Adelaide city centre.

Sydney is a coastal basin with the Tasman Sea to the east, the Blue Mountains to the west, the Hawkesbury River to the north, and the Woronora Plateau to the south. The inner city measures 25 km² (10 sq mi), the Greater Sydney region covers 12,367 km² (4,775 sq mi), and the city's urban area is 1,687 km² (651 sq mi) in size. Greater Sydney's boundaries stretch 88 kilometres (55 mi) from Palm Beach in the north to Waterfall in the south, and 70 kilometres (43 mi) from Bondi Beach in the east to Emu Plains in the west.

The Nepean River wraps around the western edge of the city and becomes the Hawkesbury River before reaching Broken Bay. Most of Sydney's water storages can be found on tributaries of the Nepean River. The Parramatta River is mostly industrial and drains a large area of Sydney's western suburbs into Port Jackson. The southern parts of the city are drained by the Georges River and the Cooks River into Botany Bay.

Sydney is a coastal basin with the Tasman Sea to the east, the Blue Mountains to the west, the Hawkesbury River to the north, and the Woronora Plateau to the south. The inner city measures 25 km² (10 sq mi), the Greater Sydney region covers 12,367 km² (4,775 sq mi), and the city's urban area is 1,687 km² (651 sq mi) in size. Greater Sydney's boundaries stretch 88 kilometres (55 mi) from Palm Beach in the north to Waterfall in the south, and 70 kilometres (43 mi) from Bondi Beach in the east to Emu Plains in the west.

The Nepean River wraps around the western edge of the city and becomes the Hawkesbury River before reaching Broken Bay. Most of Sydney's water storages can be found on tributaries of the Nepean River. The Parramatta River is mostly industrial and drains a large area of Sydney's western suburbs into Port Jackson. The southern parts of the city are drained by the Georges River and the Cooks River into Botany Bay.

Narcosis while diving (also known as nitrogen narcosis, inert gas narcosis, raptures of the deep, Martini effect) is a reversible alteration in consciousness that occurs while diving at depth. It is caused by the anesthetic effect of certain gases at high pressure. The Greek word νάρκωσις (narkōsis), "the act of making numb", is derived from νάρκη (narkē), "numbness, torpor", a term used by Homer and Hippocrates. Narcosis produces a state similar to drunkenness (alcohol intoxication), or nitrous oxide inhalation. It can occur during shallow dives, but does not usually become noticeable at depths less than 30 meters (100 ft).

Except for helium and probably neon, all gases that can be breathed have a narcotic effect, although widely varying in degree. The effect is consistently greater for gases with a higher lipid solubility, and although the mechanism of this phenomenon is still not fully clear, there is good evidence that the two properties are mechanistically related. As depth increases, the mental impairment may become hazardous. Divers can learn to cope with some of the effects of narcosis, but it is impossible to develop a tolerance. Narcosis affects all divers, although susceptibility varies widely among individuals and from dive to dive.

Narcosis while diving (also known as nitrogen narcosis, inert gas narcosis, raptures of the deep, Martini effect) is a reversible alteration in consciousness that occurs while diving at depth. It is caused by the anesthetic effect of certain gases at high pressure. The Greek word νάρκωσις (narkōsis), "the act of making numb", is derived from νάρκη (narkē), "numbness, torpor", a term used by Homer and Hippocrates. Narcosis produces a state similar to drunkenness (alcohol intoxication), or nitrous oxide inhalation. It can occur during shallow dives, but does not usually become noticeable at depths less than 30 meters (100 ft).

Except for helium and probably neon, all gases that can be breathed have a narcotic effect, although widely varying in degree. The effect is consistently greater for gases with a higher lipid solubility, and although the mechanism of this phenomenon is still not fully clear, there is good evidence that the two properties are mechanistically related. As depth increases, the mental impairment may become hazardous. Divers can learn to cope with some of the effects of narcosis, but it is impossible to develop a tolerance. Narcosis affects all divers, although susceptibility varies widely among individuals and from dive to dive.

Ancient Greece (Greek: Ἑλλάς, romanized: Hellás) was a northeastern Mediterranean civilization, existing from the Greek Dark Ages of the 12th–9th centuries BC to the end of classical antiquity (c. AD 600), that comprised a loose collection of culturally and linguistically related city-states and other territories—unified only once, for 13 years, under Alexander the Great's empire (336-323 BC). In Western history, the era of classical antiquity was immediately followed by the Early Middle Ages and the Byzantine period.

Roughly three centuries after the Late Bronze Age collapse of Mycenaean Greece, Greek urban poleis began to form in the 8th century BC, ushering in the Archaic period and colonization of the Mediterranean Basin. This was followed by the age of Classical Greece, from the Greco-Persian Wars to the 5th to 4th centuries BC. The conquests of Alexander the Great of Macedon spread Hellenistic civilization from the western Mediterranean to Central Asia. The Hellenistic period ended with the conquest of the eastern Mediterranean world by the Roman Republic, and the annexation of the Roman province of Macedonia in Roman Greece, and later the province of Achaea during the Roman Empire.

Ancient Greece (Greek: Ἑλλάς, romanized: Hellás) was a northeastern Mediterranean civilization, existing from the Greek Dark Ages of the 12th–9th centuries BC to the end of classical antiquity (c. AD 600), that comprised a loose collection of culturally and linguistically related city-states and other territories—unified only once, for 13 years, under Alexander the Great's empire (336-323 BC). In Western history, the era of classical antiquity was immediately followed by the Early Middle Ages and the Byzantine period.

Roughly three centuries after the Late Bronze Age collapse of Mycenaean Greece, Greek urban poleis began to form in the 8th century BC, ushering in the Archaic period and colonization of the Mediterranean Basin. This was followed by the age of Classical Greece, from the Greco-Persian Wars to the 5th to 4th centuries BC. The conquests of Alexander the Great of Macedon spread Hellenistic civilization from the western Mediterranean to Central Asia. The Hellenistic period ended with the conquest of the eastern Mediterranean world by the Roman Republic, and the annexation of the Roman province of Macedonia in Roman Greece, and later the province of Achaea during the Roman Empire.

The Baháʼí Faith is a relatively new religion teaching the essential worth of all religions and the unity of all people. Established by Baháʼu'lláh in the 19th century, it initially developed in Iran and parts of the Middle East, where it has faced ongoing persecution since its inception. The religion is estimated to have over five million adherents, known as Baháʼís, spread throughout most of the world's countries and territories.

The religion has three central figures: the Báb (1819–1850), considered a herald who taught that God would soon send a prophet in the same way as Jesus or Muhammad, and who was executed by Iranian authorities in 1850; Baháʼu'lláh (1817–1892), who claimed to be that prophet in 1863 and faced exile and imprisonment for most of his life; and his son, ʻAbdu'l-Bahá (1844–1921), who was released from confinement in 1908 and made teaching trips to Europe and the United States. After ʻAbdu'l-Bahá's death in 1921, leadership of the religion fell to his grandson Shoghi Effendi (1897–1957). Baháʼís annually elect local, regional, and national Spiritual Assemblies that govern the religion's affairs. Every five years the members of all National Spiritual Assemblies elect the Universal House of Justice, the nine-member supreme governing institution of the worldwide Baháʼí community that is located in Haifa, Israel, near the Shrine of the Báb.

According to the Baháʼí teachings, religion is revealed in an orderly and progressive way by a single God through Manifestations of God, who are the founders of major world religions throughout history; Buddha, Jesus, and Muhammad are noted as the most recent of these before the Báb and Baháʼu'lláh. Baháʼís regard the major religions as fundamentally unified in purpose, though varied in social practices and interpretations. The Baháʼí Faith stresses the unity of all people, explicitly rejecting racism and nationalism. At the heart of Baháʼí teachings is the goal of a unified world order that ensures the prosperity of all nations, races, creeds, and classes.

The Baháʼí Faith is a relatively new religion teaching the essential worth of all religions and the unity of all people. Established by Baháʼu'lláh in the 19th century, it initially developed in Iran and parts of the Middle East, where it has faced ongoing persecution since its inception. The religion is estimated to have over five million adherents, known as Baháʼís, spread throughout most of the world's countries and territories.

The religion has three central figures: the Báb (1819–1850), considered a herald who taught that God would soon send a prophet in the same way as Jesus or Muhammad, and who was executed by Iranian authorities in 1850; Baháʼu'lláh (1817–1892), who claimed to be that prophet in 1863 and faced exile and imprisonment for most of his life; and his son, ʻAbdu'l-Bahá (1844–1921), who was released from confinement in 1908 and made teaching trips to Europe and the United States. After ʻAbdu'l-Bahá's death in 1921, leadership of the religion fell to his grandson Shoghi Effendi (1897–1957). Baháʼís annually elect local, regional, and national Spiritual Assemblies that govern the religion's affairs. Every five years the members of all National Spiritual Assemblies elect the Universal House of Justice, the nine-member supreme governing institution of the worldwide Baháʼí community that is located in Haifa, Israel, near the Shrine of the Báb.

According to the Baháʼí teachings, religion is revealed in an orderly and progressive way by a single God through Manifestations of God, who are the founders of major world religions throughout history; Buddha, Jesus, and Muhammad are noted as the most recent of these before the Báb and Baháʼu'lláh. Baháʼís regard the major religions as fundamentally unified in purpose, though varied in social practices and interpretations. The Baháʼí Faith stresses the unity of all people, explicitly rejecting racism and nationalism. At the heart of Baháʼí teachings is the goal of a unified world order that ensures the prosperity of all nations, races, creeds, and classes.

Wayne, c. 1965

Marion Robert Morrison (May 26, 1907 – June 11, 1979), known professionally as John Wayne and nicknamed The Duke, was an American actor and filmmaker who became a popular icon through his starring roles in films made during Hollywood's Golden Age, especially in Western and war movies. His career flourished from the silent era of the 1920s through the American New Wave, as he appeared in a total of 179 film and television productions. He was among the top box-office draws for three decades, and he appeared with many other important Hollywood stars of his era. In 1999, the American Film Institute selected Wayne as one of the greatest male stars of classic American cinema.

Wayne was born in Winterset, Iowa, but grew up in Southern California. He lost a football scholarship to the University of Southern California as a result of a bodysurfing accident, and began working for the Fox Film Corporation. He appeared mostly in small parts, but his first leading role came in Raoul Walsh's Western The Big Trail (1930), an early widescreen film epic which was a box-office failure. He played leading roles in numerous B movies during the 1930s, most of them also Westerns, without becoming a major name. John Ford's Stagecoach (1939) made Wayne a mainstream star, and he starred in 142 motion pictures altogether. According to one biographer, "John Wayne personified for millions the nation's frontier heritage."

Wayne, c. 1965

Marion Robert Morrison (May 26, 1907 – June 11, 1979), known professionally as John Wayne and nicknamed The Duke, was an American actor and filmmaker who became a popular icon through his starring roles in films made during Hollywood's Golden Age, especially in Western and war movies. His career flourished from the silent era of the 1920s through the American New Wave, as he appeared in a total of 179 film and television productions. He was among the top box-office draws for three decades, and he appeared with many other important Hollywood stars of his era. In 1999, the American Film Institute selected Wayne as one of the greatest male stars of classic American cinema.

Wayne was born in Winterset, Iowa, but grew up in Southern California. He lost a football scholarship to the University of Southern California as a result of a bodysurfing accident, and began working for the Fox Film Corporation. He appeared mostly in small parts, but his first leading role came in Raoul Walsh's Western The Big Trail (1930), an early widescreen film epic which was a box-office failure. He played leading roles in numerous B movies during the 1930s, most of them also Westerns, without becoming a major name. John Ford's Stagecoach (1939) made Wayne a mainstream star, and he starred in 142 motion pictures altogether. According to one biographer, "John Wayne personified for millions the nation's frontier heritage."

Bread is a staple food prepared from a dough of flour (usually wheat) and water, usually by baking. Throughout recorded history and around the world, it has been an important part of many cultures' diet. It is one of the oldest human-made foods, having been of significance since the dawn of agriculture, and plays an essential role in both religious rituals and secular culture.

Bread is a staple food prepared from a dough of flour (usually wheat) and water, usually by baking. Throughout recorded history and around the world, it has been an important part of many cultures' diet. It is one of the oldest human-made foods, having been of significance since the dawn of agriculture, and plays an essential role in both religious rituals and secular culture.

Hindi cinema, often known as Bollywood and formerly as Bombay cinema, is the Indian Hindi-language film industry based in Mumbai (formerly Bombay). The term is a portmanteau of "Bombay" and "Hollywood". The industry is part of the larger Indian cinema—the world's largest by number of feature films produced, along with the cinema of South India and other Indian film industries.

In 2017, Indian cinema produced 1,986 feature films, with Bollywood as its largest filmmaker, producing 364 Hindi films the same year. Bollywood represents 43 percent of Indian net box-office revenue; Tamil and Telugu cinema represent 36 percent, and the remaining regional cinema constituted 21 percent in 2014. Bollywood has overtaken the U.S. film industry to become the largest centre for film production in the world. In 2001 ticket sales, Indian cinema (including Bollywood) reportedly sold an estimated 3.6 billion tickets worldwide, compared to Hollywood's 2.6 billion tickets sold. Bollywood films tend to use vernacular Hindustani, mutually intelligible by people who self-identify as speaking either Hindi or Urdu, and modern Bollywood movies increasingly incorporate elements of Hinglish.

Hindi cinema, often known as Bollywood and formerly as Bombay cinema, is the Indian Hindi-language film industry based in Mumbai (formerly Bombay). The term is a portmanteau of "Bombay" and "Hollywood". The industry is part of the larger Indian cinema—the world's largest by number of feature films produced, along with the cinema of South India and other Indian film industries.

In 2017, Indian cinema produced 1,986 feature films, with Bollywood as its largest filmmaker, producing 364 Hindi films the same year. Bollywood represents 43 percent of Indian net box-office revenue; Tamil and Telugu cinema represent 36 percent, and the remaining regional cinema constituted 21 percent in 2014. Bollywood has overtaken the U.S. film industry to become the largest centre for film production in the world. In 2001 ticket sales, Indian cinema (including Bollywood) reportedly sold an estimated 3.6 billion tickets worldwide, compared to Hollywood's 2.6 billion tickets sold. Bollywood films tend to use vernacular Hindustani, mutually intelligible by people who self-identify as speaking either Hindi or Urdu, and modern Bollywood movies increasingly incorporate elements of Hinglish.

Alexander Graham Bell (/ˈɡreɪ.əm/, born Alexander Bell; March 3, 1847 – August 2, 1922) was a Scottish-born inventor, scientist, and engineer who is credited with patenting the first practical telephone. He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885.

Bell's father, grandfather, and brother had all been associated with work on elocution and speech and both his mother and wife were deaf; profoundly influencing Bell's life's work. His research on hearing and speech further led him to experiment with hearing devices which eventually culminated in Bell being awarded the first U.S. patent for the telephone, on March 7, 1876. Bell considered his invention an intrusion on his real work as a scientist and refused to have a telephone in his study.

Many other inventions marked Bell's later life, including groundbreaking work in optical telecommunications, hydrofoils, and aeronautics. Although Bell was not one of the 33 founders of the National Geographic Society, he had a strong influence on the magazine while serving as the second president from January 7, 1898, until 1903.

Alexander Graham Bell (/ˈɡreɪ.əm/, born Alexander Bell; March 3, 1847 – August 2, 1922) was a Scottish-born inventor, scientist, and engineer who is credited with patenting the first practical telephone. He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885.

Bell's father, grandfather, and brother had all been associated with work on elocution and speech and both his mother and wife were deaf; profoundly influencing Bell's life's work. His research on hearing and speech further led him to experiment with hearing devices which eventually culminated in Bell being awarded the first U.S. patent for the telephone, on March 7, 1876. Bell considered his invention an intrusion on his real work as a scientist and refused to have a telephone in his study.

Many other inventions marked Bell's later life, including groundbreaking work in optical telecommunications, hydrofoils, and aeronautics. Although Bell was not one of the 33 founders of the National Geographic Society, he had a strong influence on the magazine while serving as the second president from January 7, 1898, until 1903.

Albania (/ælˈbeɪniə, ɔːl-/ (listen) a(w)l-BAY-nee-ə; Albanian: Shqipëri or Shqipëria), officially the Republic of Albania (Albanian: Republika e Shqipërisë), is a country in Southeastern Europe. It is located on the Adriatic and Ionian Sea within the Mediterranean Sea and shares land borders with Montenegro to the northwest, Kosovo to the northeast, North Macedonia to the east and Greece to the south. Tirana is its capital and largest city, followed by Durrës, Vlorë and Shkodër.

Albania displays varied climatic, geological, hydrological, and morphological conditions, defined in an area of 28,748 km² (11,100 sq mi). It possesses significant diversity with the landscape ranging from the snow-capped mountains in the Albanian Alps as well as the Korab, Skanderbeg, Pindus and Ceraunian Mountains to the hot and sunny coasts of the Albanian Adriatic and Ionian Sea along the Mediterranean Sea.

Albania has been inhabited by different civilisations over time, such as the Illyrians, Thracians, Greeks, Romans, Byzantines, Venetians and Ottomans. The Albanians established the autonomous Principality of Arbër in the 12th century. The Kingdom of Albania and Principality of Albania formed between the 13th and 14th centuries. Prior to the Ottoman conquest of Albania in the 15th century, the Albanian resistance to Ottoman expansion into Europe led by Gjergj Kastrioti Skanderbeg won them acclaim over most of Europe. Albania remained under Ottoman rule for nearly five centuries, during which many Albanians (known as Arnauts) attained high-ranking offices in the empire, especially in the Southern Balkans and Egypt. Between the 18th and 19th centuries, cultural developments, widely attributed to Albanians having gathered both spiritual and intellectual strength, conclusively led to the Albanian Renaissance. After the defeat of the Ottomans in the Balkan Wars, the modern nation state of Albania declared independence in 1912. In the 20th century, the Kingdom of Albania was invaded by Italy which formed Greater Albania before becoming a protectorate of Nazi Germany. Enver Hoxha formed the People's Socialist Republic of Albania after World War II, modeled under the terms of Hoxhaism. The Revolutions of 1991 concluded the fall of communism in Albania and eventually the establishment of the current Republic of Albania.

Albania (/ælˈbeɪniə, ɔːl-/ (listen) a(w)l-BAY-nee-ə; Albanian: Shqipëri or Shqipëria), officially the Republic of Albania (Albanian: Republika e Shqipërisë), is a country in Southeastern Europe. It is located on the Adriatic and Ionian Sea within the Mediterranean Sea and shares land borders with Montenegro to the northwest, Kosovo to the northeast, North Macedonia to the east and Greece to the south. Tirana is its capital and largest city, followed by Durrës, Vlorë and Shkodër.

Albania displays varied climatic, geological, hydrological, and morphological conditions, defined in an area of 28,748 km² (11,100 sq mi). It possesses significant diversity with the landscape ranging from the snow-capped mountains in the Albanian Alps as well as the Korab, Skanderbeg, Pindus and Ceraunian Mountains to the hot and sunny coasts of the Albanian Adriatic and Ionian Sea along the Mediterranean Sea.

Albania has been inhabited by different civilisations over time, such as the Illyrians, Thracians, Greeks, Romans, Byzantines, Venetians and Ottomans. The Albanians established the autonomous Principality of Arbër in the 12th century. The Kingdom of Albania and Principality of Albania formed between the 13th and 14th centuries. Prior to the Ottoman conquest of Albania in the 15th century, the Albanian resistance to Ottoman expansion into Europe led by Gjergj Kastrioti Skanderbeg won them acclaim over most of Europe. Albania remained under Ottoman rule for nearly five centuries, during which many Albanians (known as Arnauts) attained high-ranking offices in the empire, especially in the Southern Balkans and Egypt. Between the 18th and 19th centuries, cultural developments, widely attributed to Albanians having gathered both spiritual and intellectual strength, conclusively led to the Albanian Renaissance. After the defeat of the Ottomans in the Balkan Wars, the modern nation state of Albania declared independence in 1912. In the 20th century, the Kingdom of Albania was invaded by Italy which formed Greater Albania before becoming a protectorate of Nazi Germany. Enver Hoxha formed the People's Socialist Republic of Albania after World War II, modeled under the terms of Hoxhaism. The Revolutions of 1991 concluded the fall of communism in Albania and eventually the establishment of the current Republic of Albania.

The Billboard 200 is a record chart ranking the 200 most popular music albums and EPs in the United States. It is published weekly by Billboard magazine. It is frequently used to convey the popularity of an artist or groups of artists. Often, a recording act will be remembered by its "number ones", those of their albums that outperformed all others during at least one week. The chart grew from a weekly top 10 list in 1956 to become a top 200 in May 1967, and acquired its present title in March 1992. Its previous names include the Billboard Top LPs (1961–1972), Billboard Top LPs & Tape (1972–1984), Billboard Top 200 Albums (1984–1985), and Billboard Top Pop Albums (1985–1992).

The chart is based mostly on sales (both at retail and digital) of albums in the United States. The weekly sales period was originally Monday to Sunday when Nielsen started tracking sales in 1991, but since July 2015, tracking week begins on Friday (to coincide with the Global Release Date of the music industry) and ends on Thursday. A new chart is published the following Tuesday with an issue post-dated to the Saturday of that week, four days later. The chart's streaming schedule is also tracked from Friday to Thursday. New product is released to the American market on Fridays. Digital downloads of albums are also included in Billboard 200 tabulation. Albums that are not licensed for retail sale in the United States (yet purchased in the U.S. as imports) are not eligible to chart. A long-standing policy which made titles that are sold exclusively by specific retail outlets (such as Walmart and Starbucks) ineligible for charting, was reversed on November 7, 2007, and took effect in the issue dated November 17.

Beginning with the December 13, 2014 issue, Billboard updated the methodology of their album chart to also include on-demand streaming and digital track sales (as measured by Nielsen SoundScan) by way of a new algorithm, utilizing data from all of the major on-demand audio subscription and online music sales services in the United States. Starting on the issue dated January 18, 2020, Billboard updated the methodology to compile the chart again by incorporating video data from YouTube, along with visual plays from digital platforms like Apple Music, Spotify, Tidal, Vevo, and as of the issue dated March 23, 2021, Facebook.

The Billboard 200 is a record chart ranking the 200 most popular music albums and EPs in the United States. It is published weekly by Billboard magazine. It is frequently used to convey the popularity of an artist or groups of artists. Often, a recording act will be remembered by its "number ones", those of their albums that outperformed all others during at least one week. The chart grew from a weekly top 10 list in 1956 to become a top 200 in May 1967, and acquired its present title in March 1992. Its previous names include the Billboard Top LPs (1961–1972), Billboard Top LPs & Tape (1972–1984), Billboard Top 200 Albums (1984–1985), and Billboard Top Pop Albums (1985–1992).

The chart is based mostly on sales (both at retail and digital) of albums in the United States. The weekly sales period was originally Monday to Sunday when Nielsen started tracking sales in 1991, but since July 2015, tracking week begins on Friday (to coincide with the Global Release Date of the music industry) and ends on Thursday. A new chart is published the following Tuesday with an issue post-dated to the Saturday of that week, four days later. The chart's streaming schedule is also tracked from Friday to Thursday. New product is released to the American market on Fridays. Digital downloads of albums are also included in Billboard 200 tabulation. Albums that are not licensed for retail sale in the United States (yet purchased in the U.S. as imports) are not eligible to chart. A long-standing policy which made titles that are sold exclusively by specific retail outlets (such as Walmart and Starbucks) ineligible for charting, was reversed on November 7, 2007, and took effect in the issue dated November 17.

Beginning with the December 13, 2014 issue, Billboard updated the methodology of their album chart to also include on-demand streaming and digital track sales (as measured by Nielsen SoundScan) by way of a new algorithm, utilizing data from all of the major on-demand audio subscription and online music sales services in the United States. Starting on the issue dated January 18, 2020, Billboard updated the methodology to compile the chart again by incorporating video data from YouTube, along with visual plays from digital platforms like Apple Music, Spotify, Tidal, Vevo, and as of the issue dated March 23, 2021, Facebook.

Musk turtle is the common name given to three genera of aquatic turtles:

• Sternotherus, the musk turtles proper
• Staurotypus, variously called Mexican, three-keeled, or giant musk turtles
• Claudius, the narrow-bridged musk turtle (Full article...)

Musk turtle is the common name given to three genera of aquatic turtles:

• Sternotherus, the musk turtles proper
• Staurotypus, variously called Mexican, three-keeled, or giant musk turtles
• Claudius, the narrow-bridged musk turtle (Full article...)

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Gifu (岐阜市, Gifu-shi) is a city located in the south-central portion of Gifu Prefecture, Japan, and serves as the prefectural capital. The city has played an important role in Japan's history because of its location in the middle of the country. During the Sengoku period, various warlords, including Oda Nobunaga, used the area as a base in an attempt to unify and control Japan. Gifu continued to flourish even after Japan's unification as both an important shukuba along the Edo period Nakasendō and, later, as one of Japan's fashion centers. It has been designated a core city by the national government.

Located on the alluvial plain of the Nagara River, Gifu has taken advantage of the surrounding natural resources to create both traditional industries (including Mino washi and agriculture) and tourism opportunities such as cormorant fishing. Mount Kinka, one of the city's major symbols, is home to a nationally designated forest and Gifu Castle, a replica of Nobunaga's former castle. Gifu also hosts many festivals and events throughout the year.

Gifu (岐阜市, Gifu-shi) is a city located in the south-central portion of Gifu Prefecture, Japan, and serves as the prefectural capital. The city has played an important role in Japan's history because of its location in the middle of the country. During the Sengoku period, various warlords, including Oda Nobunaga, used the area as a base in an attempt to unify and control Japan. Gifu continued to flourish even after Japan's unification as both an important shukuba along the Edo period Nakasendō and, later, as one of Japan's fashion centers. It has been designated a core city by the national government.

Located on the alluvial plain of the Nagara River, Gifu has taken advantage of the surrounding natural resources to create both traditional industries (including Mino washi and agriculture) and tourism opportunities such as cormorant fishing. Mount Kinka, one of the city's major symbols, is home to a nationally designated forest and Gifu Castle, a replica of Nobunaga's former castle. Gifu also hosts many festivals and events throughout the year.

John Gregorson Campbell (1836 – 22 November 1891) was a Scottish folklorist and Free Church minister at the Tiree and Coll parishes in Argyll, Scotland. An avid collector of traditional stories, he became Secretary to the Ossianic Society of Glasgow University in the mid-1850s. Ill health had prevented him taking up employment as a Minister when he was initially approved to preach by the Presbytery of Glasgow in 1858 and later after he was appointed to Tiree by the Duke of Argyll in 1861, parishioners objected to his manner of preaching.

John Gregorson Campbell (1836 – 22 November 1891) was a Scottish folklorist and Free Church minister at the Tiree and Coll parishes in Argyll, Scotland. An avid collector of traditional stories, he became Secretary to the Ossianic Society of Glasgow University in the mid-1850s. Ill health had prevented him taking up employment as a Minister when he was initially approved to preach by the Presbytery of Glasgow in 1858 and later after he was appointed to Tiree by the Duke of Argyll in 1861, parishioners objected to his manner of preaching.

The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of French domination over most of continental Europe. The wars stemmed from the unresolved disputes associated with the French Revolution and its resultant conflict. The wars are often categorised into five conflicts, each termed after the coalition that fought Napoleon: the Third Coalition (1805), the Fourth (1806–07), the Fifth (1809), the Sixth (1813–14), and the Seventh (1815).

Napoleon, upon ascending to First Consul of France in 1799, had inherited a republic in chaos; he subsequently created a state with stable finances, a strong bureaucracy, and a well-trained army. In 1805, Austria and Russia formed the Third Coalition and waged war against France. In response, Napoleon defeated the allied Russo-Austrian army at Austerlitz in December 1805, which is considered his greatest victory. At sea, the British severely defeated the joint Franco-Spanish navy in the Battle of Trafalgar on 21 October 1805. This victory secured British control of the seas and prevented the invasion of Britain itself. Concerned about increasing French power, Prussia led the creation of the Fourth Coalition with Russia, Saxony, and Sweden, and the resumption of war in October 1806. Napoleon quickly defeated the Prussians at Jena and the Russians at Friedland, bringing an uneasy peace to the continent. The peace failed, though, as war broke out in 1809, with the badly prepared Fifth Coalition, led by Austria. At first, the Austrians won a stunning victory at Aspern-Essling, but were quickly defeated at the bloody Wagram, which was the bloodiest battle in history until the battle of Leipzig.

Hoping to isolate and weaken Britain economically through his Continental System, Napoleon launched an invasion of Portugal, the only remaining British ally in continental Europe. After occupying Lisbon in November 1807, and with the bulk of French troops present in Spain, Napoleon seized the opportunity to turn against his former ally, depose the reigning Spanish royal family and declare his brother King of Spain in 1808 as José I. The Spanish and Portuguese revolted with British support and expelled the French from Iberia in 1814 after six years of fighting.

Concurrently, Russia, unwilling to bear the economic consequences of reduced trade, routinely violated the Continental System, prompting Napoleon to launch a massive invasion of Russia in 1812. The resulting campaign ended in disaster and the near destruction of Napoleon's Grande Armée.

Encouraged by the defeat, Austria, Prussia, Sweden, and Russia formed the Sixth Coalition and began a new campaign against France, decisively defeating Napoleon at Leipzig in October 1813 after several inconclusive engagements. The Allies then invaded France from the east, while the Peninsular War spilled over into southwestern France. Coalition troops captured Paris at the end of March 1814 and forced Napoleon to abdicate in April. He was exiled to the island of Elba, and the Bourbons were restored to power. But Napoleon escaped in February 1815, and reassumed control of France for around one hundred days. After forming the Seventh Coalition, the allies defeated him at Waterloo in June 1815 and exiled him to Saint Helena, where he died six years later.

The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of French domination over most of continental Europe. The wars stemmed from the unresolved disputes associated with the French Revolution and its resultant conflict. The wars are often categorised into five conflicts, each termed after the coalition that fought Napoleon: the Third Coalition (1805), the Fourth (1806–07), the Fifth (1809), the Sixth (1813–14), and the Seventh (1815).

Napoleon, upon ascending to First Consul of France in 1799, had inherited a republic in chaos; he subsequently created a state with stable finances, a strong bureaucracy, and a well-trained army. In 1805, Austria and Russia formed the Third Coalition and waged war against France. In response, Napoleon defeated the allied Russo-Austrian army at Austerlitz in December 1805, which is considered his greatest victory. At sea, the British severely defeated the joint Franco-Spanish navy in the Battle of Trafalgar on 21 October 1805. This victory secured British control of the seas and prevented the invasion of Britain itself. Concerned about increasing French power, Prussia led the creation of the Fourth Coalition with Russia, Saxony, and Sweden, and the resumption of war in October 1806. Napoleon quickly defeated the Prussians at Jena and the Russians at Friedland, bringing an uneasy peace to the continent. The peace failed, though, as war broke out in 1809, with the badly prepared Fifth Coalition, led by Austria. At first, the Austrians won a stunning victory at Aspern-Essling, but were quickly defeated at the bloody Wagram, which was the bloodiest battle in history until the battle of Leipzig.

Hoping to isolate and weaken Britain economically through his Continental System, Napoleon launched an invasion of Portugal, the only remaining British ally in continental Europe. After occupying Lisbon in November 1807, and with the bulk of French troops present in Spain, Napoleon seized the opportunity to turn against his former ally, depose the reigning Spanish royal family and declare his brother King of Spain in 1808 as José I. The Spanish and Portuguese revolted with British support and expelled the French from Iberia in 1814 after six years of fighting.

Concurrently, Russia, unwilling to bear the economic consequences of reduced trade, routinely violated the Continental System, prompting Napoleon to launch a massive invasion of Russia in 1812. The resulting campaign ended in disaster and the near destruction of Napoleon's Grande Armée.

Encouraged by the defeat, Austria, Prussia, Sweden, and Russia formed the Sixth Coalition and began a new campaign against France, decisively defeating Napoleon at Leipzig in October 1813 after several inconclusive engagements. The Allies then invaded France from the east, while the Peninsular War spilled over into southwestern France. Coalition troops captured Paris at the end of March 1814 and forced Napoleon to abdicate in April. He was exiled to the island of Elba, and the Bourbons were restored to power. But Napoleon escaped in February 1815, and reassumed control of France for around one hundred days. After forming the Seventh Coalition, the allies defeated him at Waterloo in June 1815 and exiled him to Saint Helena, where he died six years later.

Location of Lithuania in the European Union

Lithuania is divided into three layers of administrative divisions. The first-level division consists of 10 counties (Lithuanian: singular – apskritis, plural – apskritys). These are sub-divided into 60 municipalities (Lithuanian: plural – savivaldybės, singular – savivaldybė), which in turn are further sub-divided into over 500 smaller groups, known as elderships (Lithuanian: plural – seniūnijos, singular – seniūnija).

At the end of its tenure as a Soviet Socialist Republic, Lithuania's administrative divisions consisted of 44 regions, 12 cities, 80 towns, 19 settlements, and 426 rural districts. The reform of this system was an immediate concern for the new government. The Constitution of Lithuania, ratified in 1992, delegated the power of establishing future administrative units to the Lithuanian Parliament (Seimas). Accordingly, the Seimas passed two fundamental laws: a 1993 law on government representation and a 1994 law specifying the territorial-administrative units and their boundaries. The current system of a set of municipalities under 10 counties was codified by 1995. Several changes were made in 2000, resulting in 60 municipalities.

Ordinary municipal councilors are elected every four years from electoral lists using proportional representation. The mayor, who is a member of the council, is elected directly by the residents in a majority vote in run-off election. Before 2015, the mayors were elected by the municipal councils.

Location of Lithuania in the European Union

Lithuania is divided into three layers of administrative divisions. The first-level division consists of 10 counties (Lithuanian: singular – apskritis, plural – apskritys). These are sub-divided into 60 municipalities (Lithuanian: plural – savivaldybės, singular – savivaldybė), which in turn are further sub-divided into over 500 smaller groups, known as elderships (Lithuanian: plural – seniūnijos, singular – seniūnija).

At the end of its tenure as a Soviet Socialist Republic, Lithuania's administrative divisions consisted of 44 regions, 12 cities, 80 towns, 19 settlements, and 426 rural districts. The reform of this system was an immediate concern for the new government. The Constitution of Lithuania, ratified in 1992, delegated the power of establishing future administrative units to the Lithuanian Parliament (Seimas). Accordingly, the Seimas passed two fundamental laws: a 1993 law on government representation and a 1994 law specifying the territorial-administrative units and their boundaries. The current system of a set of municipalities under 10 counties was codified by 1995. Several changes were made in 2000, resulting in 60 municipalities.

Ordinary municipal councilors are elected every four years from electoral lists using proportional representation. The mayor, who is a member of the council, is elected directly by the residents in a majority vote in run-off election. Before 2015, the mayors were elected by the municipal councils.

Overview map of the Vogelsberg

The Vogelsberg is a large volcanic mountain range in the German Central Uplands in the state of Hesse, separated from the Rhön Mountains by the Fulda river valley. Emerging approximately 19 million years ago, the Vogelsberg is Central Europe's largest basalt formation, consisting of a multitude of layers that descend from their peak in ring-shaped terraces to the base.

Overview map of the Vogelsberg

The Vogelsberg is a large volcanic mountain range in the German Central Uplands in the state of Hesse, separated from the Rhön Mountains by the Fulda river valley. Emerging approximately 19 million years ago, the Vogelsberg is Central Europe's largest basalt formation, consisting of a multitude of layers that descend from their peak in ring-shaped terraces to the base.

Despite finishing with a worse record than their previous 2 seasons, their 21–61 record was good enough for 3rd place. The Braves showed improvement under new Coach Jack Ramsay. Rookie center Bob McAdoo provided the silver lining by winning the Rookie of the Year Award with 18.0 points per game and 9.1 rebounds per game.

Despite finishing with a worse record than their previous 2 seasons, their 21–61 record was good enough for 3rd place. The Braves showed improvement under new Coach Jack Ramsay. Rookie center Bob McAdoo provided the silver lining by winning the Rookie of the Year Award with 18.0 points per game and 9.1 rebounds per game.

The Forth Road Bridge is a suspension bridge in east central Scotland. The bridge opened in 1964 and at the time was the longest suspension bridge in the world outside the United States. The bridge spans the Firth of Forth, connecting Edinburgh, at South Queensferry, to Fife, at North Queensferry. It replaced a centuries-old ferry service to carry vehicular traffic, cyclists and pedestrians across the Forth; railway crossings are made by the nearby Forth Bridge, opened in 1890.

The Scottish Parliament voted to scrap tolls on the bridge from February 2008. The adjacent Queensferry Crossing was opened in August 2017 to carry the M90 motorway across the Firth of Forth, replacing the Forth Road Bridge which had exceeded its design capacity. At its peak, the Forth Road Bridge carried 65,000 vehicles per day.

The Forth Road Bridge is a suspension bridge in east central Scotland. The bridge opened in 1964 and at the time was the longest suspension bridge in the world outside the United States. The bridge spans the Firth of Forth, connecting Edinburgh, at South Queensferry, to Fife, at North Queensferry. It replaced a centuries-old ferry service to carry vehicular traffic, cyclists and pedestrians across the Forth; railway crossings are made by the nearby Forth Bridge, opened in 1890.

The Scottish Parliament voted to scrap tolls on the bridge from February 2008. The adjacent Queensferry Crossing was opened in August 2017 to carry the M90 motorway across the Firth of Forth, replacing the Forth Road Bridge which had exceeded its design capacity. At its peak, the Forth Road Bridge carried 65,000 vehicles per day.

Firstlight Media is a Canada-based company that provides managed services for the distribution of premium video to IP-connected devices. The company's cloud-native platform powers video services for Tier 1 streaming providers, among them aha (streaming service), Rogers Sports & Media's Sportsnet Now, and Struum.

Firstlight Media is headquartered in Toronto, Ontario; with a headend in San Diego California, and offices in Los Angeles, California, and Chennai, India. Firstlight partnered with Highview Capital Partners to acquire Quickplay Media from AT&T in March, 2020.

Firstlight Media is a Canada-based company that provides managed services for the distribution of premium video to IP-connected devices. The company's cloud-native platform powers video services for Tier 1 streaming providers, among them aha (streaming service), Rogers Sports & Media's Sportsnet Now, and Struum.

Firstlight Media is headquartered in Toronto, Ontario; with a headend in San Diego California, and offices in Los Angeles, California, and Chennai, India. Firstlight partnered with Highview Capital Partners to acquire Quickplay Media from AT&T in March, 2020.

In mathematics, two non-zero real numbers a and b are said to be commensurable if their ratio a/b is a rational number; otherwise a and b are called incommensurable. (Recall that a rational number is one that is equivalent to the ratio of two integers.) There is a more general notion of commensurability in group theory.

For example, the numbers 3 and 2 are commensurable because their ratio, 3/2, is a rational number. The numbers and are also commensurable because their ratio, , is a rational number. However, the numbers and 2 are incommensurable because their ratio, , is an irrational number.

In mathematics, two non-zero real numbers a and b are said to be commensurable if their ratio a/b is a rational number; otherwise a and b are called incommensurable. (Recall that a rational number is one that is equivalent to the ratio of two integers.) There is a more general notion of commensurability in group theory.

For example, the numbers 3 and 2 are commensurable because their ratio, 3/2, is a rational number. The numbers and are also commensurable because their ratio, , is a rational number. However, the numbers and 2 are incommensurable because their ratio, , is an irrational number.

Past and future Milankovitch cycles via VSOP model
• Graphic shows variations in five orbital elements:
  Axial tilt or obliquity (ε).
  Eccentricity (e).
  Longitude of perihelion ( sin(ϖ) ).
  Precession index ( e sin(ϖ) )
• Precession index and obliquity control insolation at each latitude:
  Daily-average insolation at top of atmosphere on summer solstice () at 65° N
• Ocean sediment and Antarctic ice strata record ancient sea levels and temperatures:
  Benthic forams (57 widespread locations)
  Vostok ice core (Antarctica)
• Vertical gray line shows present (2000 CE)

Milankovitch cycles describe the collective effects of changes in the Earth's movements on its climate over thousands of years. The term is named for Serbian geophysicist and astronomer Milutin Milanković. In the 1920s, he hypothesized that variations in eccentricity, axial tilt, and precession combined to result in cyclical variations in the intra-annual and latitudinal distribution of solar radiation at the Earth's surface, and that this orbital forcing strongly influenced the Earth's climatic patterns.

Similar astronomical hypotheses had been advanced in the 19th century by Joseph Adhemar, James Croll, and others, but verification was difficult because there was no reliably dated evidence, and because it was unclear which periods were important.

Past and future Milankovitch cycles via VSOP model
• Graphic shows variations in five orbital elements:
  Axial tilt or obliquity (ε).
  Eccentricity (e).
  Longitude of perihelion ( sin(ϖ) ).
  Precession index ( e sin(ϖ) )
• Precession index and obliquity control insolation at each latitude:
  Daily-average insolation at top of atmosphere on summer solstice () at 65° N
• Ocean sediment and Antarctic ice strata record ancient sea levels and temperatures:
  Benthic forams (57 widespread locations)
  Vostok ice core (Antarctica)
• Vertical gray line shows present (2000 CE)

Milankovitch cycles describe the collective effects of changes in the Earth's movements on its climate over thousands of years. The term is named for Serbian geophysicist and astronomer Milutin Milanković. In the 1920s, he hypothesized that variations in eccentricity, axial tilt, and precession combined to result in cyclical variations in the intra-annual and latitudinal distribution of solar radiation at the Earth's surface, and that this orbital forcing strongly influenced the Earth's climatic patterns.

Similar astronomical hypotheses had been advanced in the 19th century by Joseph Adhemar, James Croll, and others, but verification was difficult because there was no reliably dated evidence, and because it was unclear which periods were important.

The Aeolian mode is a musical mode or, in modern usage, a diatonic scale also called the natural minor scale. On the white piano keys, it is the scale that starts with A. Its ascending interval form consists of a key note, whole step, half step, whole step, whole step, half step, whole step, whole step. That means that, in A aeolian (or A minor), you would play A, move up a whole step (two piano keys) to B, move up a half step (one piano key) to C, then up a whole step to D, a whole step to E, a half step to F, a whole step to G, and a final whole step to a high A.

(Full article...)

The Aeolian mode is a musical mode or, in modern usage, a diatonic scale also called the natural minor scale. On the white piano keys, it is the scale that starts with A. Its ascending interval form consists of a key note, whole step, half step, whole step, whole step, half step, whole step, whole step. That means that, in A aeolian (or A minor), you would play A, move up a whole step (two piano keys) to B, move up a half step (one piano key) to C, then up a whole step to D, a whole step to E, a half step to F, a whole step to G, and a final whole step to a high A.

(Full article...)

Double-entry bookkeeping, also known as, double-entry accounting, is a method of bookkeeping that relies on a two-sided accounting entry to maintain financial information. Every entry to an account requires a corresponding and opposite entry to a different account. The double-entry system has two equal and corresponding sides known as debit and credit. A transaction in double-entry bookkeeping always affects at least two accounts, always includes at least one debit and one credit, and always has total debits and total credits that are equal.

For example, if a business takes out a bank loan for $10,000, recording the transaction would require a debit of $10,000 to an asset account called "Cash", as well as a credit of $10,000 to a liability account called "Notes Payable".

The basic entry to record this transaction in a general ledger will look like this:

Cash 10,000 / Notes Payable / 10,000

Double-entry bookkeeping, also known as, double-entry accounting, is a method of bookkeeping that relies on a two-sided accounting entry to maintain financial information. Every entry to an account requires a corresponding and opposite entry to a different account. The double-entry system has two equal and corresponding sides known as debit and credit. A transaction in double-entry bookkeeping always affects at least two accounts, always includes at least one debit and one credit, and always has total debits and total credits that are equal.

For example, if a business takes out a bank loan for $10,000, recording the transaction would require a debit of $10,000 to an asset account called "Cash", as well as a credit of $10,000 to a liability account called "Notes Payable".

The basic entry to record this transaction in a general ledger will look like this:

Cash 10,000 / Notes Payable / 10,000

This page is a list of the owners and executives of the Boston Red Sox.

This page is a list of the owners and executives of the Boston Red Sox.

Kirby 64: The Crystal Shards is a 2000 platform game developed by HAL Laboratory and published by Nintendo for the Nintendo 64 (N64). It is the first Kirby game to feature 3D computer graphics and follows Kirby as he attempts to reassemble a sacred crystal shattered by Dark Matter. Gameplay is viewed from a 2.5D perspective and is similar to previous Kirby titles; the player traverses levels and obtains powers by eating enemies. Kirby 64 introduces Power Combos, the ability to mix powers to create more powerful ones. In a multiplayer mode, up to four players can compete in three minigames.

Kirby 64: The Crystal Shards is a 2000 platform game developed by HAL Laboratory and published by Nintendo for the Nintendo 64 (N64). It is the first Kirby game to feature 3D computer graphics and follows Kirby as he attempts to reassemble a sacred crystal shattered by Dark Matter. Gameplay is viewed from a 2.5D perspective and is similar to previous Kirby titles; the player traverses levels and obtains powers by eating enemies. Kirby 64 introduces Power Combos, the ability to mix powers to create more powerful ones. In a multiplayer mode, up to four players can compete in three minigames.

Mahameru (Semeru) above Mount Bromo, East Java.

The geography of Indonesia is dominated by volcanoes that are formed due to subduction zones between the Eurasian plate and the Indo-Australian plate.

Mahameru (Semeru) above Mount Bromo, East Java.

The geography of Indonesia is dominated by volcanoes that are formed due to subduction zones between the Eurasian plate and the Indo-Australian plate.

'Cripps Pink' apples

An apple is an edible fruit produced by an apple tree (Malus domestica). Apple trees are cultivated worldwide and are the most widely grown species in the genus Malus. The tree originated in Central Asia, where its wild ancestor, Malus sieversii, is still found today. Apples have been grown for thousands of years in Asia and Europe and were brought to North America by European colonists. Apples have religious and mythological significance in many cultures, including Norse, Greek, and European Christian tradition.

Apples grown from seed tend to be very different from those of their parents, and the resultant fruit frequently lacks desired characteristics. Generally, apple cultivars are propagated by clonal grafting onto rootstocks. Apple trees grown without rootstocks tend to be larger and much slower to fruit after planting. Rootstocks are used to control the speed of growth and the size of the resulting tree, allowing for easier harvesting.

There are more than 7,500 known cultivars of apples. Different cultivars are bred for various tastes and uses, including cooking, eating raw, and cider production. Trees and fruit are prone to a number of fungal, bacterial, and pest problems, which can be controlled by a number of organic and non-organic means. In 2010, the fruit's genome was sequenced as part of research on disease control and selective breeding in apple production.

'Cripps Pink' apples

An apple is an edible fruit produced by an apple tree (Malus domestica). Apple trees are cultivated worldwide and are the most widely grown species in the genus Malus. The tree originated in Central Asia, where its wild ancestor, Malus sieversii, is still found today. Apples have been grown for thousands of years in Asia and Europe and were brought to North America by European colonists. Apples have religious and mythological significance in many cultures, including Norse, Greek, and European Christian tradition.

Apples grown from seed tend to be very different from those of their parents, and the resultant fruit frequently lacks desired characteristics. Generally, apple cultivars are propagated by clonal grafting onto rootstocks. Apple trees grown without rootstocks tend to be larger and much slower to fruit after planting. Rootstocks are used to control the speed of growth and the size of the resulting tree, allowing for easier harvesting.

There are more than 7,500 known cultivars of apples. Different cultivars are bred for various tastes and uses, including cooking, eating raw, and cider production. Trees and fruit are prone to a number of fungal, bacterial, and pest problems, which can be controlled by a number of organic and non-organic means. In 2010, the fruit's genome was sequenced as part of research on disease control and selective breeding in apple production.

Shropshire Damson, shown at centre left. Other plums shown are Imperial Gage (labelled 1), Lombard (3), Maynard (4) and Yellow Egg (5).

Several cultivars have been selected, and some are found in Great Britain, Ireland and the United States. There are still relatively few varieties of damson, with The Garden recording no more than "eight or nine varieties" in existence at the end of the 19th century; some are self-fertile and can reproduce from seed as well as by grafting. The cultivars 'Farleigh Damson' and 'Prune Damson' have gained the Royal Horticultural Society's Award of Garden Merit.

• 'Farleigh Damson' (syn. 'Crittenden's Prolific', 'Strood Cluster') is named after the village of East Farleigh in Kent, where it was raised by James Crittenden in the early 19th century. An 1871 letter to the Journal of horticulture and practical gardening claimed that the original seedling had been found by a Mr. Herbert, the tenant of a market garden in Strood, who had given it to Crittenden. It has small, roundish, black fruit, with a blue bloom, and is a very heavy bearer. Its heavy cropping led to it being widely planted in England.
• 'Shropshire Prune' (syn. 'Prune Damson', 'Long Damson', 'Damascene', 'Westmoreland Damson', 'Cheshire Damson') is a very old variety; its blue-purple, ovoid fruit has a distinctively "full rich astringent" flavour considered superior to other damsons, and it was thought particularly suitable for canning. Hogg states that this was the variety that became specifically associated with the old name "damascene". The local types often known as the "Westmoreland Damson" and "Cheshire Damson" are described as synonymous with the Shropshire Prune by the horticulturalist Harold Taylor and others. The Shropshire was also the best-known variety of damson in the United States.
• Similar to the Shropshire Prune and possibly part of the same landrace, 'Aylesbury Prune' (syn. 'Bucks Prune', 'Michaelmas Prune') is a semi-wild plum of damson type from the area of Buckinghamshire and Berkshire centred on Ivinghoe. It is relatively large-fruited and was considered by growers to have a high resistance to silver leaf, although was reputed to be poor for canning. Along with the Victoria plum, the Aylesbury Prune was one of the parents of the culinary plum 'Laxton's Cropper'. Although orchards of the Aylesbury Prune are now rare, Aylesbury Vale District Council has made efforts to conserve it.
• 'Frogmore' is a cultivar first grown in the 19th century in the Royal Gardens at Frogmore, where it was raised by head gardener Thomas Ingram. It described as having sweet, round-oval, purplish black fruit, which ripen in early September.
• 'King of the Damsons' (syn. 'Bradley's King') is a Nottinghamshire late-season variety, making a vigorous and spreading tree with foliage that turns a distinctive yellow in autumn. It was first distributed by Bradley & Sons of Halam in around 1880. The medium to large, obovoid purple fruit is relatively sweet with dryish flesh.
• 'Merryweather' is a popular 20th century cultivar, introduced by the firm of Henry Merryweather & Sons of Southwell, Nottinghamshire in 1907. The tree's parentage is unknown; it has leaves well above the size of other damsons, and is thought to have at least some culinary plum ancestry. The fruit is deep blue, large, and noticeably sweet when ripe, although having genuine damson astringency.
• 'Early Rivers', registered in 1871, was raised by Rivers' Nursery from a seed of the variety St Etienne, and has roundish fruit with a chalky bloom. The small, red-purple clingstone damsons ripen as early as mid-August: they have very juicy flesh but lack "true damson flavour".
• 'Blue Violet' originated in Westmoreland (likely as a hybrid or development of 'Shropshire Prune') and was first sent to the National Fruit Trials in the 1930s. An early variety, fruiting in August, it was long thought to have been lost but a few trees were discovered in the Lake District in 2007.
• 'Common Damson' (syn. 'Small Round Damson') was a traditional cultivar with small, black fruit, being probably very close to wild specimens. It had a mealy texture and acid flavour, and by the 1940s it was no longer planted.

Shropshire Damson, shown at centre left. Other plums shown are Imperial Gage (labelled 1), Lombard (3), Maynard (4) and Yellow Egg (5).

Several cultivars have been selected, and some are found in Great Britain, Ireland and the United States. There are still relatively few varieties of damson, with The Garden recording no more than "eight or nine varieties" in existence at the end of the 19th century; some are self-fertile and can reproduce from seed as well as by grafting. The cultivars 'Farleigh Damson' and 'Prune Damson' have gained the Royal Horticultural Society's Award of Garden Merit.

• 'Farleigh Damson' (syn. 'Crittenden's Prolific', 'Strood Cluster') is named after the village of East Farleigh in Kent, where it was raised by James Crittenden in the early 19th century. An 1871 letter to the Journal of horticulture and practical gardening claimed that the original seedling had been found by a Mr. Herbert, the tenant of a market garden in Strood, who had given it to Crittenden. It has small, roundish, black fruit, with a blue bloom, and is a very heavy bearer. Its heavy cropping led to it being widely planted in England.
• 'Shropshire Prune' (syn. 'Prune Damson', 'Long Damson', 'Damascene', 'Westmoreland Damson', 'Cheshire Damson') is a very old variety; its blue-purple, ovoid fruit has a distinctively "full rich astringent" flavour considered superior to other damsons, and it was thought particularly suitable for canning. Hogg states that this was the variety that became specifically associated with the old name "damascene". The local types often known as the "Westmoreland Damson" and "Cheshire Damson" are described as synonymous with the Shropshire Prune by the horticulturalist Harold Taylor and others. The Shropshire was also the best-known variety of damson in the United States.
• Similar to the Shropshire Prune and possibly part of the same landrace, 'Aylesbury Prune' (syn. 'Bucks Prune', 'Michaelmas Prune') is a semi-wild plum of damson type from the area of Buckinghamshire and Berkshire centred on Ivinghoe. It is relatively large-fruited and was considered by growers to have a high resistance to silver leaf, although was reputed to be poor for canning. Along with the Victoria plum, the Aylesbury Prune was one of the parents of the culinary plum 'Laxton's Cropper'. Although orchards of the Aylesbury Prune are now rare, Aylesbury Vale District Council has made efforts to conserve it.
• 'Frogmore' is a cultivar first grown in the 19th century in the Royal Gardens at Frogmore, where it was raised by head gardener Thomas Ingram. It described as having sweet, round-oval, purplish black fruit, which ripen in early September.
• 'King of the Damsons' (syn. 'Bradley's King') is a Nottinghamshire late-season variety, making a vigorous and spreading tree with foliage that turns a distinctive yellow in autumn. It was first distributed by Bradley & Sons of Halam in around 1880. The medium to large, obovoid purple fruit is relatively sweet with dryish flesh.
• 'Merryweather' is a popular 20th century cultivar, introduced by the firm of Henry Merryweather & Sons of Southwell, Nottinghamshire in 1907. The tree's parentage is unknown; it has leaves well above the size of other damsons, and is thought to have at least some culinary plum ancestry. The fruit is deep blue, large, and noticeably sweet when ripe, although having genuine damson astringency.
• 'Early Rivers', registered in 1871, was raised by Rivers' Nursery from a seed of the variety St Etienne, and has roundish fruit with a chalky bloom. The small, red-purple clingstone damsons ripen as early as mid-August: they have very juicy flesh but lack "true damson flavour".
• 'Blue Violet' originated in Westmoreland (likely as a hybrid or development of 'Shropshire Prune') and was first sent to the National Fruit Trials in the 1930s. An early variety, fruiting in August, it was long thought to have been lost but a few trees were discovered in the Lake District in 2007.
• 'Common Damson' (syn. 'Small Round Damson') was a traditional cultivar with small, black fruit, being probably very close to wild specimens. It had a mealy texture and acid flavour, and by the 1940s it was no longer planted.

Wind power or wind energy is the use of wind turbines to generate electricity. Wind power is a popular, sustainable, renewable energy source that has a much smaller impact on the environment than burning fossil fuels. Wind farms consist of many individual wind turbines, which are connected to the electric power transmission network.

In 2020, wind supplied almost 1600 TWh of electricity, which was over 5% of worldwide electrical generation and about 2% of energy consumption. With over 100 GW added during 2020, mostly in China, global installed wind power capacity reached more than 730 GW. To help meet the Paris Agreement goals to limit climate change, analysts say it should expand much faster - by over 1% of electricity generation per year.

New onshore (on-land) wind farms are cheaper than new coal or gas plants, but expansion of wind power is being hindered by fossil fuel subsidies. Onshore wind farms have a greater visual impact on the landscape than other power stations, as they need to be spread over more land and need to be built in rural areas. Small onshore wind farms can feed some energy into the grid or provide power to isolated off-grid locations. Offshore wind farms provide a steadier and stronger source of energy and have less visual impact. Although there is less offshore wind power at present and construction and maintenance costs are higher, it is expanding.

Wind power or wind energy is the use of wind turbines to generate electricity. Wind power is a popular, sustainable, renewable energy source that has a much smaller impact on the environment than burning fossil fuels. Wind farms consist of many individual wind turbines, which are connected to the electric power transmission network.

In 2020, wind supplied almost 1600 TWh of electricity, which was over 5% of worldwide electrical generation and about 2% of energy consumption. With over 100 GW added during 2020, mostly in China, global installed wind power capacity reached more than 730 GW. To help meet the Paris Agreement goals to limit climate change, analysts say it should expand much faster - by over 1% of electricity generation per year.

New onshore (on-land) wind farms are cheaper than new coal or gas plants, but expansion of wind power is being hindered by fossil fuel subsidies. Onshore wind farms have a greater visual impact on the landscape than other power stations, as they need to be spread over more land and need to be built in rural areas. Small onshore wind farms can feed some energy into the grid or provide power to isolated off-grid locations. Offshore wind farms provide a steadier and stronger source of energy and have less visual impact. Although there is less offshore wind power at present and construction and maintenance costs are higher, it is expanding.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.

Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes. Earth's liquid outer core generates the magnetic field that shapes Earth's magnetosphere, deflecting destructive solar winds.

Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical regions than polar regions and is redistributed by atmospheric and ocean circulation. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. Greenhouse gases in the atmosphere like carbon dioxide (CO₂) trap a part of the energy from the Sun close to the surface. A region's climate is governed by latitude, but also by elevation and proximity to moderating oceans. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most areas and greatly impacts life.

Earth is an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution. Earth rotates around its own axis in a day. Earth's axis of rotation is tilted with respect to its orbital plane with the Sun, producing seasons. Earth is orbited by one permanent natural satellite, the Moon, which orbits Earth at 380,000 km (1.3 light seconds) and is roughly a quarter as wide as Earth. The Moon always faces the Earth with the same side through tidal locking and causes tides, stabilizes Earth's axis and gradually slows its rotation.