The "big breakthroughs" in science seeming to be "bigger" than ever, and happening faster and faster. But just how do scientists challenge current belief to come up with scientific breakthroughs? Today's group of scientific experts discusses the role of independent scientific study; how "paradigms" work in science; and whether scientific discoveries are conditioned by the prevailing culture. Joining host Robert Lawrence Kuhn are evolutionary biologist Francisco Ayala; philosopher and neuroscientist Patricia Smith Churchland; author/astronomer Timothy Ferris; child psychologist Rochel Gelman; and astrophysicist Neil deGrasse Tyson.