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Your dominant hand is made, not born, experiments suggest

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Most people favor one hand, and that hand tends to be the better one for writing, throwing and managing chopsticks. The long-standing view is that the dominant hand is “born” more capable, its skills rooted in a brain hemisphere specialized for motor control. A new study in PNAS argues that this difference in skill is not innate at all. It is the consequence of a lifetime of practice, and it surfaces only when we pick up a tool.


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