Impact hypothesis loses its sparkle: Shock-synthesized diamonds said to prove catastrophic impact killed off N. American megafauna can't be found
Monday, August 30, 2010 - 15:21
in Paleontology & Archaeology
The warming that following the last Ice Age was interrupted by a cold snap that killed off megafauna such as the giant ground sloth and the woolly mammoth. Could this crisis have been caused by an asteroid impact or a comet breaking up in the atmosphere? Unfortunately the geological evidence for such a dramatic event has not stood up to scrutiny. In a new study, a group of scientists challenges the catastrophists last, best hope: shock-synthesized nanodiamonds.