GalaxyMosaic t1_ja1pxx9 wrote
Reply to comment by jupitaur9 in Mysterious marks on Ice Age cave art may have been a form of record keeping. by Rifletree
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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