The Economist -
31 Oct 2013 17:59

Actually, I don't like you that much SINISTER v dexterous. Commie v Tory. The difference between left and right carries more meaning to human beings than mere matters of handedness and symmetry. And so it is with man's best friend as well. For in dogs, too, left and right signal different things. Specifically, it is in the way they wag their tails. And for dogs, like people, it is the left-hand side that is sinister.The story started a few years ago when Giorgio Vallortigara of the University of...
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