Most left-handers can rattle off a list of their eminent comrades-in-arms: Oprah Winfrey, Albert Einstein, and Barack Obama, just to name three, but they may want to add on cockatoos, ‘southpaw’ squirrels, and some house cats. But why do people and animals naturally favor one side over the other, and what does it teach us about the brain’s inner workings? Researchers explore these questions in a new article.



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