Nope. I’ll never be a scientist. And, for exactly the reasons you point out in replying to my comment. I’m way too impatient, not willing to dig deeply into background info, etc etc.
Now, an attempt at a serious question...
If the land bridge was a result of the massive ice caps, how did those traveling across reach the land bridge through the ice fields?
The question comes from vague recollections of descriptions of the ice fields extending all the way down to the current New York city area in the North America region. Also, some about the ice fields being massive enough to gouge out the great lakes basins.
Was that a different ice age? Or did I get wires crossed somewhere?
The question comes from vague recollections of descriptions of the ice fields extending all the way down to the current New York city area in the North America region. Also, some about the ice fields being massive enough to gouge out the great lakes basins.
You are correct about the ice fields. But folks were already in Alaska some 30,000 or so years ago, before the heaviest ice. Some areas of Alaska or "Beringia" were not covered with ice, so people survived. Then, near the end of the last ice age there opened up a corridor between Alaska and the continental US. This is what allowed the land migration to take place while there was still a lot of ice around elsewhere.
Starting about the same time folks headed down the coast in watercraft. They were a lot quicker, but that migration didn't get too far inland.