[qam1]

The problem is that prior there was already constant change in the ‘Climate Footprints’ with ice ages coming and going for at least a million years.

The big mammals survived & thrived these previous changes seemingly with no problem.

But what was the difference between the previous retreats and the last one?

Man.

So methinks this is just another PC study, desperately trying to keep the myth of the Noble Savage going.

[Interesting Times]

Except that the extinctions overwhelming occurred in North America rather than the other populated continents. I suspect one or more impact events, myself...