ice-free

Oh and roughly 65M of sea level rise as the planet shifts to a snow/ice-free mode.

There have been a few major explanations that overlap in parts: 1) The Ice-Free Corridor, which was closed from 26-14ka.

Al Gore himself said that, in five years, the polar ice cap would be ice-free..

Yeah, probably, most of them -- but there've been ice-free north poles many previous times in the Polar bears' 2.5-million-year evolutionary history.

My lay understanding is that the theory is that these earlier humans crossed the Bering land bridge but that they didn't proceed through a inland ice-free corridor (as there was none then).

I don't think so, because those ports won't be ice-free, and will therefore be of little use.

So the ice-free north pole is going to kill the polar bears?

Witter has historical significance as being an accessible ice-free port in winter.

Areas that are currently marginally glaciated are most likely to become ice-free.

Also worth noting as the earlier arrival doesn't rule out the later ice-free corridor traversal as having also happens - it just means it wasn't the first people to arrive in the Americas.

> Oh and roughly 65M of sea level rise as the planet shifts to a snow/ice-free mode.

The ice-free area is about as big as California.

It got "exciting" trying to make my way down on the pavement via the direct route, as it involved frantically trying to brake on ice, with the risk of a sudden stop when reaching the ice-free heavily trafficked road at the bottom....