For his latest book, "Is Gwyneth Paltrow Wrong About Everything? How the Famous Sell Us Elixirs of Health, Beauty & Happiness," health-science expert Timothy Caulfield of the University of Alberta set out to answer a simple question: why do we believe in the health and beauty treatments that celebrities tell us will transform our lives, when they have no scientific foundation? Caulfield is in conversation with the Uncharted Festival curator, Lance Knobel, at the 2015 Uncharted Festival of Ideas.