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A comment on Poor Grades Tied to Class Times That Don’t Match Our Biological Clocks. Parent comment

Re:Poor Grades Tied to Class Times That Don’t Match Our Biol... by barry-cotter on Saturday March 31, 2018 @05:23AM (#16722522)
Circadian rhythms depend on time since sunrise/sunset.
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Re:Poor Grades Tied to Class Times That Don’t Match Our Biol... by e12e on Sunday April 01, 2018 @08:05AM (#16727837)
As I understand it, it's more of an internal clock that can be shifted by sunrise/sunset light/dark - but there appear to be a biological/inherited component. Hence some mammals have evolved a rhythm more dependent on seasons than day/night, due to polar day/night cycles: https://www.researchgate.net/publication/41942188_A_Circadia...

Which in turn might imply that humans still being rather young species is tuned to a rather strict day/night cycle, as seen close to the equator.

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