A new species of dinosaur with strange claws has been unearthed in ... The specimen had excellently preserved hands, with a 3D sheath where the claw — made out of keratin, like our fingernails — would ...

The Duonychus tsogtbaatari fossils preserve the keratin sheath that covered its bony claw. Photograph by Kobayashi, et, al Dinosaur claws were made of bone covered in keratin sheaths, the same ...

A new species of dinosaur with strange claws has been ... The specimen had excellently preserved hands, with a 3D sheath where the claw — made out of keratin, like our fingernails — would ...