Regenerative medicine has long targeted the impossible - regrowing a diseased organ, or a hand lost in an accident. But biologist Michael Levin thinks an astonishing breakthrough may be within reach. He has resurrected a much-maligned branch of science, and shown that a little-understood process can trigger remarkable feats of regeneration in animals. As his research advances, he's moving us closer to the day when regeneration is possible in people.
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