University of Calgary paleontologist Darla Zelenitsky says the species, Duonychus, as shown in this illustration, evolved to have only two claws from three, which were used for gathering vegetation.

CALGARY - A University of Calgary paleontologist is part of a discovery of a new species of dinosaur with 30-centimetre-long claws found in a Mongolian desert. Darla Zelenitsky, an associate profe ...