Manage episode 271067774 series 1508258
For most of Homo sapiens' time out of Africa, we lived in a world defined by ice. But by around 20,000 years ago, the ice had begun to melt, the glaciers retreating back toward the poles and mountain ranges. This left behind a new world, a whole different series of environments, opportunities, and perils for the people who had made it through the Ice Age.
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