A fossil theropod dinosaur discovered in China is thought to be vegetarian, in sharp contrast with its meat-eating cousins, according to research published in Nature on September 19, 2002.Theropod dinosaurs are tradi- A fossil theropod dinosaur discovered in China is thought to be vegetarian, in sharp contrast with its meat-eating cousins, according to research published in Nature on September 19, 2002. Thermopod dinosaurs are tradi-