When a piece of skin, muscle, bone, nails, or hair gets removed or damaged, those usually grow back like nothing happened. So, why isn’t it possible for hands, or even something smaller like a finger to regrow? Or would a piece of meat just regrow there instead of something useful?
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It is possible, human kids before the age of 9 roughly can regrow the tips of their fingers. Dr. Michael Levin works with bio electricity and has been able to stimulate the regrowth of amphibian limbs that don’t typically have that available to them in the wild and has hinted that this isn’t unique to amphibians.
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