People often use sea ice, as seen here off Alaska’s northern coast outside the town of Utqiagvik, for travelling.
Summer Praetorius of the U.S. Geological Survey in Menlo Park, California, is lead author on a paper in which she suggests that ice that forms on the ocean might have been a platform that helped ancient people migrate southward. Praetorius and her colleagues are postulating that the first Americans might have used the same seasonal pathways to avoid giant, crevassed, ice sheets pressing down on North America at the time.
Ancient people might have used sea ice as a bridge to “coastal areas and islands with a relatively traversable surface that doubled as a platform for hunting energy-dense marine mammals,” Praetorius wrote.
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