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4th millennium BC |
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The 39th century BC was a century which lasted from the year 3900 BC to 3801 BC.
Events
[edit]![Two wooden posts set in the ground and crossing at an angle support a wooden board, which disappears into tall green reeds](https://upload.wikimedia.org/wikipedia/commons/thumb/4/43/Sweet_Track_replica.jpg/220px-Sweet_Track_replica.jpg)
- The Post Track, an ancient causeway in the Somerset Levels, England, is built, c. 3838 BC. It is one of the oldest engineered roads discovered in Northern Europe.[1]
- The Sweet Track, an ancient causeway also in the Somerset Levels, the oldest timber trackway discovered in Northern Europe, is built in 3807 BC or 3806 BC; tree-ring dating (dendrochronology) enabled very precise dating.[2]
- Plough in use.
References
[edit]- ^ "The Sweet Track & Other Trackways". Archived from the original on 10 December 2017. Retrieved 8 Mar 2018.
- ^ "The Somerset Levels (the oldest timber trackway discovered in Northern Europe)". Current Archaeology 172. February 2001. Archived from the original on 2007-03-11. Retrieved 2007-03-25.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction