Biphasic Sleep

[Barry Obummer]

Apparently our ancestor didn't sleep in 8 hour blocks and sleeping too much can be bad. Does sleeping a lot raise serotonin?

Sleep Is Overrated – Time to End the 8-Hour Sleep Myth!
Your Ancestors Didn’t Sleep Like You - SlumberWise
McDougall Newsletter - Sleeping Pills

 

[Tenacity]

Here's another perspective that may interest you.

What You Can Learn From Hunter-Gatherers' Sleeping Patterns

 

[Barry Obummer]

Here's another perspective that may interest you.

What You Can Learn From Hunter-Gatherers' Sleeping Patterns

That's interesting. Those are all hot climates though. It would be interesting to see Eskimo's (is that the PC term these days? I don't even know) sleeping patterns.