For the first time, scientists have created a lab-grown limb

Mind-controlled robotic limbs for amputees are growing more sophisticated all the time -- but a challenger has appeared. Human limb transplant surgery using the patient's own biological material could one day be an actuality.The proof of concept, published this week in the journal Biomaterials, is the limb of a rat, grown in a lab by researchers at Massachusetts General Hospital, with functioning vascular (veins) and muscle tissue.

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