Newberry Professor, Lamont-Doherty Earth Observatory (LDEO), Columbia University

Distinguished John S. Toll Professor of Geosciences, Stony Brook University

Cardiff University

department of earth sciences, cambridge university

Chair Professor of Earth Sciences, The University of Hong Kong

Professor of Biology, Harvard University

Distinguished Research Professor of Geochemistry, University of California, Los Angeles

Emeritus Professor of Palaeontology, Durham University

Professor of Geology

Senior Research Fellow, University of Bristol