Paul Shapiro joins Cool Science Radio. He is the author of Clean Meat: How Growing Meat Without Animals Will Revolutionize Dinner and the World. Shapiro is an inductee into the Animal Rights Hall of Fame and served as the vice president of policy engagement for the Humane Society of the United State. He discusees the 'next great scientific revolution,' that is underway -- discovering new ways to create enough food for the world's ever-growing, ever-hungry population.