Researchers say hormonal mechanism responsible for left-handedness

Researchers say hormonal mechanism responsible for left-handedness
Vienna (UPI) Jul 3, 2013 - The vast majority of humans are right-handed. Only about ten percent are left-hand dominant. But what causes the ten percent to prefer their opposite set of digits? Scientists have long traded theories on the matter and argued whether genetics are at play. Recently, in a survey of handedness involving 13,000 Germans and Austrians, researchers found that male southpaws are slightly more ... more

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