A40 t1_jeghjr2 wrote
Reply to comment by ryschwith in TIL an amateur archaeologist discovered European cave paintings used a proto-writing system meant to convey the gestation period of the various animals they painted by using dots to indicate the lunar cycle. by AudibleNod
The 'symbols' look like this (make them bigger/smearier): . . .
(They might be mosquitoes. Or spits. Or signatures.)
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