 It could be the fossil of one of the world's oldest dinosaurs, and it's been discovered by a team of Brazilian scientists after heavy rains in the southern state of Rio Grande del Sol. Paleontologists want to know if it's new. Daria Albinger, ABC News. Oh, no. Stomach issues again? Stomach issues? Who are you? Your pancreas. I could be the real reason for your diarrhea, gas, bloating, stomach pain, or loose oily stools.