By some estimates, as little as eight percent of the population are southpaws. And now, for the first time, scientists have discovered the genetic links connected to left-handedness—plus a core advantage that lefties may have over righties. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news …
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