Changing the Guard: Extinction and Migration in Ice Age America

At the end of the Pleistocene, North America saw the extinction of about 70% of its megafauna guild - a catastrophic event, the cause of which is fiercely debated today. The magnitude of this loss may however be a conservative figure, a suspicion that arises when perusing the list of ‘surviving’ mammalian megafauna, because many also are present in Eurasia.