When most people think about fossils, they generally think of body fossils, which are fossilized remains of parts of an organism’s body. But there is another type of fossil: trace fossils. Trace fossils are geological records of biological activity, and they provide important insight into an animal’s behavior. One important trace fossil, which provides information about an animal’s diet, is the coprolite. That’s a fancy way of saying fossilized feces. When coprolites were first discovered, they were identified as fossilized fir tree cones or bezoar stones. Bezoar stones were undigested masses found trapped in the gastrointestinal system, and were once believed to have magical properties, capable of neutralizing any poison.