It is also interesting, just generally, for the pervasiveness of 'sleep' like state among most living things. Even plants, etc. have cellular/metabolic reaction

It is also interesting, just generally, for the pervasiveness of 'sleep' like state among most living things. Even plants, etc. have cellular/metabolic reaction (to darkeness, etc). Like there needs to be some wave-form of cylclicality baked into the deep strucure of life.