'Long-term planning, long-distance exploration, large social networks, symbolic representation, and innovative technology were already in place' by 300,000 years ago. (Two generations ago, scientists thought these arose only about 50,000 years ago.)https://www.theatlantic.com/science/archive/2018/03/a-deeper-origin-of-complex-human-cultures/555674/?utm_source=twb …
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So they then sat on their asses for 250,000 years. Jeezus. Embarrassing.
They were probably developing language, humor, and more complex forms of courtship...
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