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What is the biological property of 3am to you? Is it a particular time of darkness? Is it a set point of time after you have woken up? What happens when you tra
by riazrizvi 9y ago
What is the biological property of 3am to you? Is it a particular time of darkness? Is it a set point of time after you have woken up? What happens when you travel to a different time zone, do you adapt?
- barry-cotter 9y agoCircadian rhythms depend on time since sunrise/sunset.
- e12e 9y agoAs 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_Circadian_Clock_Is_Not_Required_in_an_Arctic_Mammal 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.