jupitaur9 t1_ja0ubnl wrote
Reply to comment by avilesaviles in Mysterious marks on Ice Age cave art may have been a form of record keeping. by Rifletree
Period synchronization in humans is not a real thing.
https://ro.co/health-guide/cycles/#a-series-of-mixed-findings
GalaxyMosaic t1_ja1pxx9 wrote
It's like when you're sitting at a red light with your turn signal on, and the guy in front of you has his on. The timing isn't exactly the same but sometimes they seem to synch up for a dozen cycles or so.
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