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- Fossil footprints show humans in North America more than 21,000 years ago https://www.nbcnews.com/science/science-news/fossil-footprints-show-humans-north-america-21000-years-ago-rcna2169 2 comments
- [deleted by user] https://www.nbcnews.com/science/science-news/fossil-footprints-show-humans-north-america-21000-years-ago-rcna2169 37 comments worldnews
- Fossil footprints show humans in North America more than 21,000 years ago | The footprints are the earliest firm evidence for humans in the Americas and show people must have arrived here before the last Ice Age. https://www.nbcnews.com/science/science-news/fossil-footprints-show-humans-north-america-21000-years-ago-rcna2169 22 comments science
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