Megabeasts' Sudden Death
- Episode aired Mar 31, 2009
- TV-PG
- 53m
Thirteen thousand years ago a great tragedy in North American history caused the extinction of 35 species of large mammals. Scientists are divided on whether the cause was climate change or ... Read allThirteen thousand years ago a great tragedy in North American history caused the extinction of 35 species of large mammals. Scientists are divided on whether the cause was climate change or human predation. Nova follows the investigation of the evidence supporting a third controv... Read allThirteen thousand years ago a great tragedy in North American history caused the extinction of 35 species of large mammals. Scientists are divided on whether the cause was climate change or human predation. Nova follows the investigation of the evidence supporting a third controversial hypothesis; comet impact.