To revist this article, visit My Profile, then View saved stories. To revist this article, visit My Profile, then View saved stories. To revist this article, visit My Profile, then View saved stories. days of gene editing, biologists had a molecular tool kit that was somewhat akin to a printing press. Which is to say, altering DNA was a messy, labor intensive process of loading genes onto viruses bound for target cells. It involved more than a fair amount of finger crossing. Today, scientists...

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