Thousands of years ago, ground sloths as massive as elephants roamed the Americas. Their history, marked by spectacular adaptations, came to an abrupt end with the arrival of humans. A recent study ...
Pleistocene ground sloths constitute a remarkable and diverse group of xenarthran mammals that thrived across South America during a period of significant climatic and environmental flux. Their fossil ...
Scientists have analyzed ancient DNA and compared more than 400 fossils from 17 natural history museums to figure out how and why extinct sloths got so big. Most of us are familiar sloths, the ...
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