“So if humans were here DURING the Last Glacial Maximum, that’s because they had already arrived BEFORE it,” Ardelean noted in an email.
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One might wonder if perhaps man’s history goes far, far back. Maybe we were even technologically advanced tens of thousands of years ago. I read awhile back that a glacial period would basically grind up and extinguish any evidence of an earlier technological period. Perhaps every 40,000 years or so, as an ice age descends, mankind is reduced back to stone-age living.
Or in wars.
Read the Moon is a Harsh Mistress.