Feces, vomit and fossilized food from inside stomachs have provided new clues into how dinosaurs rose to dominate Earth, a new study revealed on Wednesday. Feces, vomit and fossilized food from inside stomachs have provided new clues into how dinosaurs rose to dominate Earth, a new study revealed on Wednesday. Evolution Paleontology & Fossils Phys.org – latest science and technology news stories