if sleep is important for cognitive function, then why dont we

>>7795711
Because sleep cycles are something that are eventually established through evolution.

Evolution doesn't care about your efficiency in learning, it cares about your ability to eat and not die.

People who sleep when it's dark and hunt all day rather than sleeping 4 hours of the day survived more.

Presumably.

>>7795711
Albert einstein did just that.

>>7795711
Because we evolved on Earth.

read historical biphasic sleep or some shit, there's a wikipedia article

historically people have actually slept in 2 blocks, just light nowadays has fucked us up i guess