An Ancient Dog Fossil Helps Trace Humans’ Path Into The Americas
A roughly 10,000-year-old bone found in southern Alaska is among the Americas’ oldest dog fossils. The new finding also adds to an ongoing debate about what route humans took after arriving in North America via a land bridge in Alaska. One long-held idea is that these first colonizers traveled inland through an ice-free corridor (SN: 8/8/18). But around 16,700 years ago, that corridor would have been covered in ice. Thus, the existence of this ancient dog supports an alternative idea – that these colonizers hugged the Pacific coast as they moved south, possibly traveling by boat.
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