[non-chalad]

Do we know how the Gulf Stream worked during the last ice age maximum, when the Rhine river still flowed over land-locked British Channel (1)?

1. https://www.arcgis.com/home/item.html?id=f1e7378b962d42168fd...

[VelesDude]

That is a good question but I suspect we wouldn't know. Just educated guesses and I cannot find those at the moment.

I think the other big issue is that back then we didn't have industrial civilization and high level agriculture dependent on specific environmental factors.