The fossils of a new species of two-clawed dinosaur, part of a group called therizinosaurus, have been unearthed in Mongolia's Gobi Desert. The species, named Duonychus tsogtbaatari, measured about 10 feet and had two-fingered hands with foot-long curved claws. It likely weighed about 260kg and lived 90-95 million years ago, researchers said. It had long neck, small head and feathers.