Frog with extendable claws (like wolverine) has been found!
Like Wolverine, Trichobatrachus robustus, is able to pop out bone claws as a defensive measure
Scientists believe that when the frog is threatened, it extends bone claws out of its toe pads in a way that is reminescent of Wolverine.
"At rest, the claws of T. robustus, found on the hind feet only, are nestled inside a mass of connective tissue. A chunk of collagen forms a bond between the claw's sharp point and a small piece of bone at the tip of the frog's toe.
The other end of the claw is connected to a muscle. Blackburn and his colleagues believe that when the animal is attacked, it contracts this muscle, which pulls the claw downwards. The sharp point then breaks away from the bony tip and cuts through the toe pad, emerging on the underside.
The end result may look like a cat's claw, but the breaking and cutting mechanism is very different and unique among vertebrates. Also unique is the fact that the claw is just bone and does not have an outer coating of keratin like other claws do"
Well, there you have it, Wolverine and his bone claws are not as far fetched as we had originally thought!
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