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PlatzhirschDe t1_j2db709 wrote

Reply to comment by PlatzhirschDe in eli5 Circadian Rhythym. how do people that don't know what time it is when they fall asleep still wake up at the same time every day? by Master_Vannaka

And there definitely is some sense of time, although it might be very subjective. In my every day life I have trained to keep track of time in my head and I can usually estimate it within 15-30 minutes.

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