Why Do We Sleep? | Quora

August 20, 2014 5:14 PM

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A number of proposals and perspectives have emerged that, taken together, paint a compelling and converging picture of why sleep evolved and why it is now needed.

Collectively, these four environmental and biological pressures lead to a bifurcation of external interactive behavior and internal maintenance activity that is synchronized with the 24-hour day/night cycle. They further encourage all postponed internal maintenance activities to be synchronized and ...

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