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Ever wondered why mosquitoes eat some people up but leave others relatively unscathed?

By Ewen Callaway Nature magazine By transforming cells from human skin into working nerve cells, researchers may have come up with a model for nervous-system diseases and perhaps even regenerative therapies based on cell transplants. The achievement, reported online today in Nature , is the latest in a fast-moving field called transdifferentiation, in which cells are forced to adopt new identities.