From SciShow.

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There are a lot of great debates in science, and a major one is when exactly humans reached the Americas. There’s contentious footprints and wishy-washy stone tools, all of which has spurred some heated academic arguments. But the most controversial evidence called the Cerutti Mastodon suggests that, if it’s real, humans may not have even been the first hominin species on our continent.

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Sources:
https://docs.google.com/document/d/e/2PACX-1vQS-1gC2rc7aDADnOvRsy0OuDTMcgWnEpZOte98WudV-Zi1tS-t_jwxCsOQRqLwhl7JK622SJsTFpIT/pub