Why are obesity, juvenile diabetes and asthma increasing? Is it something in the environment or in our modern lifestyle? Dr. Martin Blaser thinks that it may be due to changes in our microbiome – the ecosystem of tiny microscopic creatures that live in and on us. Learn about his hypothesis that some of the greatest medical advances in the 20th century – antibiotics, C-sections and antiseptics- may be having unintended consequences. Dr. Martin Blaser has studied the role of bacteria in human disease for over 30 years. He is the director of the Human Microbiome Program at NYU. He founded the Bellevue Literary Review and has been written about in newspapers including The New Yorker, Nature, Science, The New York Times, The Washington Post, and The Wall Street Journal. His more than 100 media appearances include The Today Show, The Daily Show, Fresh Air (NPR) GMA, the BBC, The O'Reilly Factor, and CNN. He lives in New York City.