S1 E5: Will We Be Visited By Aliens? / Can We Eradicate Genocide?

0:49:20 | Episode
This time he discusses space exploration and the discovery of habitable extrasolar planets, which hold the possibility of life. If aliens visited, would they come with friendly intentions? Then he explores our own species' shocking capacity for murder, war and genocide, and the "us vs them" mentality we share with other animals, including our cousins the chimpanzees.

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