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The mystery of why some people stay effortlessly thin while others struggle to keep weight off has come closer to being solved with a study isolating a gene that affects appetite.
Does a dirty scoundrel need a bath or a moral lesson? Our brains easily confuse metaphor for reality, often with dangerous consequences, says Stanford biology professor Robert Sapolsky.
Historic successes and colossal failure are often fueled by the same impulses: ambition, audacity, passion, and a burning desire to comment meaningfully on the world around us.