Sloths Only Poop Once a Week

Sloths have one of the most unusual bathroom habits in the animal kingdom. They only defecate once every 5-7 days, and when they do, it's a major event that can account for up to 30% of their body weight. The process is risky - sloths must climb down from their safe tree homes to the ground, where they're vulnerable to predators. They perform a ritualistic 'poop dance,' wiggling their bodies to help the process along. Scientists believe this weekly bathroom break serves multiple purposes: it helps maintain their relationship with symbiotic moths that live in their fur, and it may help fertilize their favorite trees.