HAIRY FROG

If you learned of a frog that was constantly breaking its bones, you’d probably think, Wow, that’s one careless amphibian. But the four-inch hairy frog of western Africa knows what it’s doing. When threatened, it can contract muscles that are connected to its hind claws, breaking the bones. The frog then thrusts the shards through the underside of its toe pads, turning them into weapons. When the foe has been vanquished, the bones retreat back into the foot, where it’s believed the tissue around the bony claws eventually regenerates. Superhero fans may recognize this move. After all, the creature’s nom de guerre is the

Wolverine frog.