Beringia is the name of the land bridge between Asia and North America, now submerged but above water during the last ice age when much more water was held in glaciers. A study in Science reported by Earthsky examined sediment cores from the submerged land to find it was once about 25,000 years ago covered by vegetation and experienced a relatively mild climate. Here’s the link:
This finding, when considered with recent genetic analyses, suggests that the people who became our indigenous Native American population lived in Beringia in relative isolation for thousands of years before completing the migration into the Americas some 15,000 years ago.
This 15,000 year figure is generally held by archeologists but still remains controversial with some evidence that they arrived earlier and even may have crossed via Iceland and Greenland from Europe.
Evidence of humans, Homo sapiens, is found in many places. Curiously our ancestors often lived in colder climes and higher elevations. Why? Maybe good hunting for them, fewer predators for them to worry about. Maybe. We have been and continue to be a species of explorers. This seeking the difficult new challenges our constitutions and our creativity so that even if there is not a material benefit, we grow hardier and smarter.
Each generation also grows hardier and smarter by challenging themselves to leave mother’s side and explore the surroundings before returning to mother for refueling. This phase of separation and individuation is called practicing. Schore documents how important it is for the brain that we develop such emotional autonomy and self-regulation. The same is true, I think, over our evolution. Next up, a one way trip to Mars?