Why Do We Have to Sleep?

Why Do We Have to Sleep?

How old is sleep as a behavior? How about 700 million years old? That’s one of the ideas put forth in this interesting, short piece on sleep. I’d forgotten about the idea of “first sleep” and “second sleep” but it does seem to explain some of the sleeping rhythms that naturally emerge for me. See minute 3:10.

Darn you, Edison! đŸ˜‰

#sleep  

https://www.youtube.com/attribution_link?a=TJwm8ghmtKM&u=/watch?v%3D3mufsteNrTI%26feature%3Dshare
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