In which Hank and John Green teach you about humanity conquering the Earth. Or at least moving from Africa into the rest of the Earth. As human beings spread out across the world and populations grew, humanity reached a critical mass of innovators, and collective learning took off! All these innovations were great for lots of human endeavors, but none fared better than agriculture.

history Africa Agriculture Anthropology evolution Migration Ethiopia humans crash course Documentary Humanity hsp3u homo sapiens big history zelda world zones