TIL a sloth's claws work the opposite way that human hand does. The default position is a tight strong grip, and sloths must exert effort to open them up. This is why sloths don't fall out of trees when they're asleep.

TIL a sloth's claws work the opposite way that human hand does. The default position is a tight strong grip, and sloths must exert effort to open them up. This is why sloths don't fall out of trees when they're asleep.

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