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Severed spines may not mean paralysis for much longer. Inject a special gel into mice with severed spinal cords and six weeks later the mice are back on their feet. It's a pretty neat trick, one that scientists at Northwestern accomplish by impregnating the gel with biochemical signals that hinder the growth of scar tissue and promote growth of myelin, the sheath that protects nerve cells and fosters their growth. More »
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