Originally published 04/27/2017
After years of debate over the dating technology used on a mastodon found in San Diego, a group of researchers now believes that they can date it and the human tools to 130,000 years ago—more than 100,000 years earlier than the earliest humans are supposed to have made it to North America.
Originally published 06/06/2014
Until about 11,000 years ago, mammoths, giant beavers, and other massive mammals roamed North America.
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