“If you look at a dog or cat claw, they’ve got like a bony claw underneath that keratin sheath, right? So, it’s the same with a dinosaur,” Zelenitsky said. Keratin, a protein that helps make up ...

“This is by far the biggest claw preserved for a dinosaur that has that keratinous sheath on it.” The dinosaur has been given the scientific name Duonychus tsogtbaatari, in honor of Mongolian ...

In one of the early scenes of Jurassic Park, the fictional paleontologist Alan Grant terrorizes a child visiting his dig site with a Deinonychus claw. If the dinosaurs were still alive they would ...