Did a comet kill off the woolly mammoth?

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

Did a comet kill off the woolly mammoth? Huge impact 13,000 years ago triggered an extreme cold snap, claims study

Californian scientists have found nanodiamonds around rock sediment in Oklahoma that formed during the Big Freeze 12.900 years ago. Nanodiamond is one type of material that could result from a comet collision. The results back up a study by Professor James Kennet in 2007 which found similar nanodiamond deposits in the area. Some scientists believe that the Big Freeze was a result of the North American ice sheet breaking apart and flooding the Atlantic Ocean with freshwater.