Research into spinal-cord injuries sometimes seems futile. Over the past century millions of hours of labor and untold millions of research dollars have poured into the field—and all that effort has yielded exactly zero treatments for spinal-cord damage. As one neurologist remarked, "It would be difficult to find any other branch of science with over a century of such sterile endeavor." But in the past decade those gloomy prospects have brightened considerably, thanks to a simple chemical called PEG.
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