All plant-eating dinosaurs were ultimately descended from a meat-eater, and switchovers to plant-eating occurred several times. The newly discovered species, which lived 125 million years ago in what is now Utah, could help scientists understand details of how the changeovers took place.Read more at USA Today
Transitional dinosaur discovered - from carnivorous to vegetarian

Paleontologists discovered a 125 million year old fossil of a transitional dinosaur in Utah. The two-legged, feathered dino ate plants, but its bones show that the transition from its carnivorous ancestors was still in progress.