Humans inner clock is not exactly 24h (sometimes more sometimes less depending on the person) but it's influenced by external factors such as light, time of eating etc., so you always lock to 24h (it's also how your body can adapt to changing timezones).
If you leave someone long enough in a place without natural light or external points of reference, they will go back to their "inner" clock which is based on the actual fluctuation of circadian proteins and hormones
Footos3003 t1_isy9tsz wrote
Reply to comment by HoTChOcLa1E in Is our sleep pattern based off the length of the day? by ebb5
Humans inner clock is not exactly 24h (sometimes more sometimes less depending on the person) but it's influenced by external factors such as light, time of eating etc., so you always lock to 24h (it's also how your body can adapt to changing timezones).
If you leave someone long enough in a place without natural light or external points of reference, they will go back to their "inner" clock which is based on the actual fluctuation of circadian proteins and hormones