Honesty is hardwired into us. And when we lie, our bodies give us away - though the signals tend to be rather subtle. Looking away, for example, covering or rubbing the eyes, rubbing the back of the neck, touching the ears, shaking the head while saying yes, or nodding while saying no. (Trust the head and not the words.)

You may have found yourself wishing that liars’ noses would grow like Pinocchio’s to clue you in when they’re being deceptive… and they do, sort of. Scientists from the Smell and Taste Treatment and Research Foundation in Chicago have found that the tissues of the nose often swell during a lie. So a quick rub of the nose can be a dead giveaway that the person you’re talking to is not being truthful.

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