I love your second sentence 
Theories of human sleep still seem very speculative. I sometimes wonder if there's some function of sleep that's essential to higher intelligence. And if AGIs would need a similar function?
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It wasn't. Nearly all creatures with central nervous systems seem to sleep, most with distinct similarities to humans (things like REM sleep may be more recent, though likely still > 10^8 years). So it's certainly an adaptation hundreds of millions of years old.
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One of the biggest mysteries to me is why some people need much less sleep without apparent adverse effects. Why didn’t evolution select for this trait?
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Maybe there's not much evolutionary advantage?
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It’s important to note (and recently discovered!) that jellyfish sleep, and they only have nerve nets: https://www.theatlantic.com/science/archive/2017/09/even-jellyfish-sleep/540432/ …
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Fascinating.
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The deep learning book has several interesting sections speculating on the role of dream sleep as sampling from a distribution.pic.twitter.com/u8tuXpxXg5
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Interesting!
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It would be surprising if only one theory were correct. Once you take a system down for maintenance, you might as well amortize the downtime across whatever other maintenance can be parallelized.
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Good point. I'm still curious about my speculative question about AGIs, though.
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