Ancient human discoveries dominated 2021. Here's what we learned

The human story -- where we come from and how we evolved -- got a new chapter in 2021. Thanks to new fossil finds and analysis of ancient DNA preserved in teeth, bones and cave dirt, scientists have unearthed startling revelations about our Homo sapien forebears, and other humans that existed before -- and in some cases, alongside us.
Here are six of this year's most ground-breaking discoveries in human prehistory that are shaping the family tree in fascinating and unexpected ways. The first Americans Footprints made in muddy earth at the edge of a wetland, in what's now New Mexico, look like they could have been made yesterday.
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