When scientists sequenced the Neanderthal genome in 2010, they learned that Neanderthals interbred with human ancestors before mysteriously going extinct. As a result, many people alive today share up to 4% of their DNA with Neanderthals.
This genetic breakthrough yielded powerful new information about the evolutionary history of Neanderthals and Homo sapiens, but it also raised a new question: Could we bring back Neanderthals?
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