New research from biological anthropologists has shown that the use of the non-dominant hand was likely to have played a vital role in the evolution of modern human hand morphology: the production of stone tools requires the thumb on the non-dominant hand to be significantly stronger and more robust than the fingers.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/KhqbojzNy4U/140910102914.htm
Non-dominant hand vital to the evolution of the thumb
10 September 2014
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