Famously sluggish sloths spend most of their lives upside down. But unlike humans, these creatures don't have trouble breathing in that inverted position because their internal organs are fixed in place, new research finds.
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How Sloths Hang Upside Down Without Getting Tired
Famously sluggish sloths spend most of their lives upside down. But unlike humans, these creatures don't have trouble breathing in that inverted position because their internal organs are fixed in place, new research finds.
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