Dinosaurs pooped. The fossil record makes that abundantly clear. Scores of coprolites – fossilized feces – not only allow paleontologists to better understand the diet and ecology of dinosaurs, but let educators pass the mineralized excrement around to students and knowingly ask “Do you know what you’re holding right now?” in the hope of a shocked reaction. But did dinosaurs ever pee? That question hasn’t exactly been at the top of paleontology’s list in terms of dinosaur mysteries. Feeding behavior, colors, sounds, and other biological details carry a bit more prestige. Nevertheless, curious fossils found at two distant locations might record how Jurassic and