Researchers: Giant Sloths, Mastodons Lived with Humans in Americas — VOA Learning English
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A sloth is a furry animal that lives mainly in South and Central America. It moves very slowly and spends most of its time in trees.
But thousands of years ago their ancestors were huge. Giant sloths could weigh up to 3.6 metric tons and lived on the ground.
For many years, scientists believed the first humans to arrive in the Americas quickly killed off these giant ground sloths, along with many other huge animals. Those include mastodons, saber-toothed cats, and dire wolves.
But research in recent years suggests that humans might have arrived in the Americas thousands of years earlier than scientists had once believed. New findings suggest that humans lived with the big animals for thousands…
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