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#giantsloths

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Did ice age beasts carve vast caves in South America?
nature.com/articles/d41586-025
nonpaywalled: archive.fo/Lp9Y2

* who/what cut ancient tunnels in sandstone in Brazil/nearby nations
* early twentieth century attributed to ancient Indigenous groups
* h/e research in past decade coalesced around theory the caves were carved by extinct megafauna
* South Am. sloth that lived between 4M - 12.k years ago
* 3m long, 1.5k kg weight