Ancient ground sloths dug massive underground tunnels that still exist ten thousand years later
Ancient giant ground sloths used massive claws to carve labyrinthine tunnels through solid earth, creating architectural wonders in South America that remain perfectly preserved ten millennia after their extinction.
The landscape of southern Brazil is home to 'paleoburrows,' massive underground tunnels reaching up to 100 meters in length that were excavated by prehistoric giant ground sloths. These Ice Age engineers weighed up to four tons and possessed arm muscles ten times stronger than a gorilla's, allowing them to dig through hard soil at rates of several meters per day.
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