Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Approximately 290 million years ago, a carnivorous dinosaur stomping around present-day Germany had a tummy ache. The Paleozoic predator eventually vomited up its stomach contents, and then hopefully continued to live its best dino life. Unlike most ancient regurgitated meals, this particular mixture of half-eaten prey and digestive bacteria successfully fossilized into what’s known as a regurgitalite. In 2021, paleontologists discovered the extremely rare find while working in the famous Bromacker Permian dig site, about 155 miles southwest of Berlin. As they detail in a study published on January 30th in the journal Scientific Reports, the fossilized regurgitation is the oldest specimen of its kind, and contains a wealth of insights into the still frequently mysterious food chain of terrestrial dinosaurs. What is a regurgitalite? Bones tell researchers a lot about ancient species, but they can’t provide the whole picture. In addition to anatomical remains, paleontologists often focus on other biological samples such as coprolites, aka fossilized poop. But …