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Sloths may be threatened by climate change, human sprawl after 64 million years of evolution
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Sloths may be threatened by climate change, human sprawl after 64 million years of evolution

Sloths, the world’s slowest mammals, have evolved over 64 million years into a species that thrives throughout Central America and northern South America, but climate change and human sprawl could be threatening the species’ survival.  Scientist Becky Cliffe is conducting the world’s first-ever population study of sloths so she can determine just how much trouble...