101 - What are the Great Questions of Science?

From genetics to cosmology to nanotechnology, science is on the brink of numerous and extraordinary mega-revolutions that will change the very nature of life. In today's episode, America's top scientists, authors and experts identify the key areas where science is focused, discuss their merits and impact, and rank them in order of importance. Joining host Robert Kuhn are astrophysicist Neil deGrasse Tyson; author/astronomer Timothy Ferris; evolutionary biologist Francisco Ayala; professor of neuroscience and philosophy Patricia Smith Churchland; and theoretical physicist Steve Koonin.