5 Animals That Regrow Body Parts

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When you were a kid you might have had the trauma-thrill of thinking you caught a lizard and opening your hand to find nothing but its squirming tail. Some lizards and other animals can lose their body parts, but are masterful at regenerating them - a feat we humans are sadly less capable of doing (except in the case of our liver).
But what we are great at is learning from those masters. Here's a roundup of some of nature's great regenerators and how they may help people down the road.