The keratin sheath added more than 40% to the claw's length. "These were big, sharp and nasty claws," said paleontologist and study co-author Darla Zelenitsky of the University of Calgary in Canada.

Paleontologists have discovered the largest fully preserved dinosaur claw in Mongolia’s Gobi Desert, belonging to a new species, Duonychus tsogtbaatari. This plant-eating dinosaur had two ...

The keratin sheath added more than 40 per cent to the claw’s length. “These were big, sharp and nasty claws,” said paleontologist and study co-author Darla Zelenitsky of the University of ...

The keratin sheath added more than 40 per cent to the claw’s length. “These were big, sharp and nasty claws,” said paleontologist and study co-author Darla Zelenitsky of the University of ...

The keratin sheath added more than 40% to the claw’s length. "These were big, sharp and nasty claws," said paleontologist and study co-author Darla Zelenitsky of the University of Calgary in Canada.