10 Creatures That Conveniently Grow Back Body Parts

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photo before after finger pig bladder dust
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Imagine if there was a magic pixie dust that would allow us to regrow limbs? Well, let's start with fingertips. A collagen powder derived from pigs' bladders reportedly allowed a man to grow his fingertip back in just a month. The man, Lee Spievack, of Cincinnati, Ohio, accidentally sliced off his fingertip with a model airplane propeller. The dust was developed by Stephen Badylak of the University of Pittsburgh, who reportedly has been doing related regeneration research for the U.S. military.

photo via Stephen Badylak