The migration corridor formed by the retreating Cordilleran and Laurentide ice sheets was nearly 1,000 miles long.
Sources
- New Study Refutes Theory of How Humans Populated North America | HISTORY (history.com)
- https://www.nature.com/articles/nature19085 (nature.com)
- https://www.smithsonianmag.com/smart-news/humans-colonized-americas-along-coast-not-through-ice-180960103/ (smithsonianmag.com)
- https://www.csmonitor.com/Science/2016/0810/A-final-blow-to-myth-of-how-people-arrived-in-the-Americas (csmonitor.com)
- https://www.nationalgeographic.com/history/article/ice-free-corridor-first-americans-archaeology-migration (nationalgeographic.com)
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