So many fascinating things in there thanks for sharing. It’s interesting that Homo sapiens got to other continents 200,000 years ago, but failed to survive there until 50,000 years ago.
I always look at these numbers and think “how did they get so far on foot?” And then I find it fun to try to imagine how it would happen in terms of individual people’s lifetimes. We’re talking about 100,000 years to get from Kenya to Greece (about 5,000 miles on foot), for people who probably lived about 30 years (ie ~3,300 generations of people). That could easily be accomplished if each new generation moved just 2 miles away from where they were born in their lifetime. Suddenly that feels more relatable.