Much of what defines us as a species is all in our heads.

First and foremost, we’ve got these big, powerful brains, and small faces tucked underneath a skull that expanded to house our most precious organ.

There’s another trait that researchers once assumed was a Homo sapiens hallmark, based in the brain but most obvious in the upper limbs: Nine out of 10 humans are considered right-handed.

To read more on Discover Magazine:

http://discovermagazine.com/2018/jun/was-science-wrong-about-being-right

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