This week, we examine how scarcity can help us more forward. First, author Robert Bryce argues that we shouldn't be worried about dwindling resources in the world. In fact, he thinks they're conserved by increasingly efficient technologies. Then, with college textbooks becoming prohibitively expensive, business professor Linda Williams came up with a radical plan -- make them free. Plus, Eileen Pollack explains the continued dearth of women in the sciences.