The axolotl is a Mexican salamander with an incredible ability: cut its leg off, and the limb will grow right back! How it does this and why humans can't is still a bit of a mystery.
HARVARD University, San Diego, University of California, Irvine ... many researchers illustrate how axolotls can grow a third limb via wounding and grafting of neighboring cells. They are studying these amphibians to understand the underlying mechanisms for their miraculous regenerative powers.
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