In 1980, a monk found a jawbone high up in a Tibetan cave. Now, a re-analysis shows the remains belonged to a Denisovan who died there 160,000 years ago. It's just the second known site where the extinct humans lived, and it shows they colonized extreme elevations long before our own ancestors did.

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In 1980, a monk found a jawbone high up in a Tibetan cave. Now, a re-analysis shows the remains belonged to a Denisovan who died there 160,000 years ago. It's just the second known site where the extinct humans lived, and it shows they colonized extreme elevations long before our own ancestors did.