A sloth can take up to 50 days to digest a meal. They have the slowest metabolism of any non-hibernating mammal. Since they're rarely desperate for another meal, they don't have to fight for food ...

The Hoffman's two-toed sloth is one of the world's slowest mammals—so sedentary that algae grows on its furry coat. The plant gives it a greenish tint that is useful camouflage in the trees of ...