In an underwater cave in the Yucatán in Mexico lies the well-preserved remains of an ancient giant sloth.
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The fossil is dated to be 10,000 years old. Researchers believe the sloth weighed at least 500 pounds. And it belongs to a newly identified species of sloth called Xibalbaonyx oviceps. The sizes of sloths have varied throughout their evolutionary history from 2,000 pounds of the extinct Megalonyx jeffersonii to 10 pounds of the modern two-toed sloth.
Read “Ancient Giant Sloth Fossil Found in Underwater Cave.”
Fossil of New Giant Sloth Species Found in Underwater Cave | National Geographic