The circadian 'secret' to a healthy body, sharp mind, and better mood
Briefly

"Biological clocks go back to primordial time. Nearly all living things on Earth emerged under inescapable daily, lunar, seasonal, and annual cycles... That original biotech gave life the capacity to prepare for coming changes rather than react."
"A symphony of inner clocks improved the chances of doing the right things at the right times. For example, it was probably imperative for our ancestors to sleep during the hours of darkness and to maximize strength and speed around sunset..."
Read at Fast Company
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