Big Duh of the Day
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"Evidence from paleontology suggests that although human brains grew for two million years of evolution, in the past 20,000 years there has been a reversal. Today, the average human brain is quite a bit smaller than it was 20,000 years ago: it's as if a tennis ball of brain material has been removed.
"Scientists aren't really sure why. Some believe our brains have become more efficient and require less energy, so they don't need to be as big. Others that as more complex societies emerged, each individual did not have to be as smart and flexible to stay alive: there were safety nets to rely on. Still others that it may be because people 'domesticated' themselves, selecting against aggression." -- Brain HQ
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Stranger than fiction
https://www.nytimes.com/2021/06/24/science/ancient-coronavirus-epidemic.html
A Coronavirus Epidemic Hit 20,000 Years Ago, New Study Finds
