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  • Originally published 04/27/2017

    A 130,000-Year-Old Mastodon Threatens to Upend Human History

    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.