The 13,000-Year-Old Man Found On A California Island — And The Dating Test That Changed The Story Of America’s First Migration
Before that corridor opened, the argument went, the Americas were effectively cut off from Asia by the continental ice.
This argument had a specific implication for the Pacific coast: even if someone had wanted to travel down the coast, the coast was blocked by glacial ice extending to the shoreline along much of British Columbia and Alaska.
There was no viable coastal route until the ice retreated enough to open a passage.
As evidence for earlier occupation accumulated, defenders of the Clovis First framework offered various responses.
Monte Verde’s dates were disputed, then accepted.