Bet you can’t eat just one. The Lays potato chip campaign plays on the idea of snacking out of control. From Oprah to "The Biggest Loser," people describe themselves like addicts, needing one more bite of fatty, salty, sugary foods, knowing full well that remorse will follow their mouthful of pleasure.
Scientists are now dipping into the popular idea that humans can be addicted to junk food, and some evidence points to that not being quite so accurate. Maggie Koerth-Baker has been watching the topic unfold for Boing Boing, where she is science editor.