Wolverine's adamantium claws are iconic in both the X-Men movies and Marvel Comics, but we still can't explain how Logan actually controls them.

“So that’s really important as we know there’s a pretty uncertain relationship between the keratin and the underlying bone,” he added via email. Most therizinosaurs had long claws to grab and ...

An illustration shows what Duonychus tsogtbaatari might have looked like. Unlike its therizinosaur brethren, the new species had only two claws instead of three. When Hokkaido University ...

One of the claws retained its outer covering – a sheath of keratin, the same material as in our fingernails – rather than just the underlying bone. The keratin sheath added more than 40% to th ...

“So that’s really important as we know there’s a pretty uncertain relationship between the keratin and the underlying bone,” he added via email. Most therizinosaurs had long claws to grab ...