Saharan civilization may date back to 12Kya, and at that time was similar to the Amazonian plains (quite lush). One thing that nags me is the continental positions at the time were somewhat different than "now", and at the end of the Wisconsin glaciation, with the seas neatly 300' (100m) lower than now, it would have far been easier for early man to have hunted & fished his way from Europe to north America, then the Beringa Ice bridge.
Fresh water (melt), fish , and game would have been readily available form France to Great Britain, to Iceland, Greenland, then to Canada. Very few credible artifacts have been found in eastern russia earlier than 4000 old. Artifacts 10-15KY old have been found out on the continental shelf while hunting "treasure", but are usually "socked away" for fear of upsetting the great lie of "native Americans" (They were no way near "first")
JMNSHO - YMMV.
I would not mind another little ice age.
I love winter and find it annoying how mild winters have become since the mid-1900's.
We used to have big blizzards here in KS....15-20 inches a couple times every decade. Now we are lucky to get one 10-inch snowstorm every couple years.
I agree. They arrived about 6,000 years ago.
Some believe the world's oceans were reduced by up to 500 feet during the Ice Age.