The conventional theory of North American population holds that the first migrants arrived from Asia across an ancient land bridge.
Sources
- New Study Refutes Theory of How Humans Populated North America | HISTORY (history.com)
- https://www.scientificamerican.com/article/first-americans-lived-on-bering-land-bridge-for-thousands-of-years/ (scientificamerican.com)
- https://www.sapiens.org/archaeology/bering-land-bridge-first-americans/ (sapiens.org)
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