Sloth

Sloths were believed to be the only mammals that don't fart—the theory was that methane from digestion was reabsorbed into the bloodstream and exhaled orally. In 2025, a viral video of a sloth farting in a warm bath debunked this myth for good.

Sloths risk their lives weekly climbing down to poop — because of moths. Moths lay eggs in sloth dung, then return to live in sloth fur. Their activity grows green algae on the fur, which sloths eat. Their own body becomes a snack farm.