Why Human Beings Normally Sleep at Night?

Why mental workers keen on working into deep night?

At night, sun goes beneath the horizon -> water and nutrition in human body concentrate at feet -> nerves on feet relaxed -> muscles of feet relaxed -> heart relaxed -> brain calm down.

Q.E.D.

Then when shall we waken?

As soon as the water and nutrition are accumulated sufficiently to reach the head.

时间： 2024-10-15 05:56:52

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