And how (and why) did they manage to populate so much of the planet so long ago without any technology. What made them venture out more and more over thousands

And how (and why) did they manage to populate so much of the planet so long ago without any technology. What made them venture out more and more over thousands of years to end up in the Americas, Asia, Oceania, etc. On foot! Chris Hasler is the wonderful person that made https://historyoftheworldpodcast.com https://historyoftheworldpodcast.com which is a great resource for anyone interested in the topic. Especially the early episodes in Volume 1.