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7 Sloth Superpowers (Like Farting to Float) Just in Time for International Sloth Day

Every October 20, the world slows down (at least in spirit) for International Sloth Day. It’s the perfect excuse to celebrate ...

Giant ground sloths’ fossilized teeth reveal their unique roles in the prehistoric ecosystem

Researchers often rely on fossil teeth for clues about what extinct animals ate. Giant ground sloths’ teeth have been tricky to analyze, though – until now.