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- Cave discoveries suggest humans reached Americas much earlier than thought https://www.nature.com/articles/d41586-020-02190-y 38 comments
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- Newly excavated tools suggest humans lived in North America at least 30,000 years ago | Mexico | The Guardian https://www.theguardian.com/world/2020/jul/22/stone-tools-chiquihuite-cave-mexico-humans-north-america 0 comments
- Controversial Cave Discoveries Suggest Humans Reached Americas Much Earlier Than Thought - Scientific American https://www.scientificamerican.com/article/controversial-cave-discoveries-suggest-humans-reached-americas-much-earlier-than-thought/ 0 comments
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