But there are times when even sloths must leave the comfort of their tree canopies and descend to the ground. Sloths, like all living things, need to defecate, which usually happens once per week.

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But that doesn't mean they're boring. In fact, sloths are one of the most extreme animals on the planet, and not just because they poop only once a week. First of all, sloths really are extremely ...