Blame North America megafauna extinction on climate change, not human ancestors
...of Washington archaeologist disputes the so-called overkill hypothesis that pins the crime on the New World's ...itics. "While the initial presentation of the overkill hypothesis was good and productive science, it has now become something more akin to a faith-based p...Climate change plus human pressure caused large mammal extinctions in late Pleistocene
...e the extinctions to human hunting, either through overkill - hunting that could have led to extinction in about 1,500 years - or through a "blitzkrieg" of hunting that could have knocked off a species in less than 500 years. Another suggestion, dubbed "sitzkrieg" after the term for a "sitting" war that shows...