Just about every living thing does it, though for many people the subject is distasteful or taboo. But poop is an important indicator of everyday gut health; it can provide vital clues about digestive disorders, or may contain bacteria that can treat them. Poop also plays an unsung role in ecosystems and animal diets, providing essential nutrients that benefit organisms of all sizes. Here's where you're find the latest poop on poop.
About 500 million years ago, a sea worm ate dinner and left behind the mother lode of turds. Then, the worm left its burrow on the seafloor, and some shelled critters discovered the droppings and died — fossilized for eternity around the poopy picnic.