To find the first Americans, search below the sea
We still don't know how humans got to the Americas. Many researchers are arguing we need to ditch the land-first hypothesis of human migration, and look for underwater evidence of a seafaring past. It's an idea that's gaining momentum, though the evidence is complex and the proposal isn't unanimously accepted.
This map shows some of the oldest archaeological sites in the Americas. Many in South America are either along the coastline or major waterways, supporting the coastal migration hypothesis. But North America looks a lot messier and lacks coastal sites.
https://www.axios.com/first-americans-may-have-used-boats-2505163352.html
