Vincent Courtillot
Vincent E. Courtillot (born 6 March 1948) is an emeritus French
geophysicist, prominent among the researchers who are critical of the hypothesis that
impact events are a primary cause of
mass extinction of life forms on the Earth. He is known for his book "''La Vie en catastrophes''" (Paris, Fayard, 1995), translated into English as "''Evolutionary catastrophes''" (1999).
Provided by Wikipedia