Why Do We Sleep, Anyway? (healthysleep.med.harvard.edu)

Without having read the article I would surmise it has a lot to do with the diurnal phase of the earth which we are physically bound to. As well, sleeping allows the attention of the physical body an opportunity to let go just long enough to enter into the universal spirit body. Highly recommended. There is nothing quite like absolute zero gravity. Better than sex ever could be. I would love it if people I talked to could have conversations thus. Ergo the net.