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Living robots built using frog cells Tiny 'xenobots' assembled from cells promise advances from drug delivery to toxic waste clean-up Scientists repurposed living frog cells -- and assembled them into entirely new life-forms. These tiny 'xenobots' can move toward a target and heal themselves after being cut. These novel living machines are neither a traditional robot nor a known species of animal. They're a new class of artifact: a living, programmable organism.(more)
