HackerMichael Levin: The electrical blueprints that orchestrate life | TED
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Michael Levin 介绍对涡虫再生的干预。短暂改变生物电状态后，后续在清水中再次截断时仍可再生为双头。第二次挑战区分了暂时外形与持续影响的状态。
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amazingly, there is an electrical gradient, head to tail, that's generated that tells the piece where the heads and the tails go and in fact, how many heads or tails you're supposed to have.These worms, when cut again and again, in the future, in plain water, they continue to regenerate as two-headed.