Some proponents claim a change in the climate alone caused extinction of the megafauna, but these arguments have to account for the fact that megafaunal species comfortably survived two million years of climatic oscillations, including a number of arid glacial periods, before their sudden extinction.
Mnogo takih vrst je izumrlo v pleistocenu ( 16.100 ± 100 - 50.000 let pred našim štetjem ).