[richardw]

I have an unbaked theory, but the very short version is:

- Animals that have peaks of energy use outcompete animals that have a steady-state energy use. Catch the animal, then rest and recover. For any given amount of energy, this means we can recruit more in a smaller window compared to an animal that plods along with no recuperative phase.

- Many things happen when you're sleeping. Rather than having everything running 24/7, having different phases means we can specialise action and recovery. Since the time is already driven by energy demands, many parts of our body and mind leverage it for different purposes.

[LesZedCB]

1 day of in-context learning and 1 night of fine-tuning on context. that's my pet theory, just shooting from the hip as a total layperson.