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National Museum of Natural History

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Meet the Scientist Decoding Human History in South America Through Giant Ground Sloth Fossils

Thaís Pansani examines the marks humans left on megafauna bones to determine when people arrived in South America and how they interacted with giant mammals

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What a Drawerful of Dung Reveals About the Lives of Ground Sloths

For International Sloth Day, learn about the scientific clues preserved in petrified poop

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