As scientists develop the ability to work at levels thousands of times smaller than a human hair, a new world of possibilities—and critical concerns—opens up. This three-part series of Fred Friendly Seminars explores the social, ethical, and personal implications of advances in nanotechnology. Hosted by Peabody award-winning journalist John Hockenberry, each program asks policymakers, researchers, and activists to wrestle with difficult but essential issues that will impact the environment, human health, public safety, and individual privacy. Discussion guides and other resources are available online. 3-part series, 57 minutes each.