Uncertain

Eric J. Nestler, director of the Friedman Brain Institute at the Mount Sinai Medical Center in New York City, talks about his article in the December issue of Scientific American magazine on epigenetics and human behavior, called "Hidden Switches in the Mind"

Listen to the announcement of the 2011 Nobel Prize in Chemistry, to Daniel Shechtman of the Technion-Israel Institute of Technology. Then hear comments from the president of the American Chemical Society, Nancy Jackson, of Sandia National Laboratories

Listen to the announcement of the 2011 Nobel Prize in Physics, to Saul Perlmutter, Brian Schmidt and Adam Riess, from the Royal Swedish Academy of Sciences. Following the formal announcement comes an explanation of the research, which tracked type Ia supernovae to discover that the expansion of the universe was accelerating, and a phone conversation with new Nobel laureate Brian Schmidt

Eric von Hofe, cancer researcher and president of the biotech company Antigen Express talks about his article in the October issue of Scientific American called "A New Ally against Cancer," about cancer vaccines

Christian de Duve, 1974 Nobel laureate for physiology or medicine, talks about going from a cell biologist to a theorist on evolution and the origin of life

In part 2 of our interview, award-winning author Carl Zimmer talks about his latest books, and a new study that shows how Toxoplasma influences the behavior of rats--and maybe of us

The annual Scientific American September single-topic issue is all about cities. And award-winning author Carl Zimmer recently penned a piece on evolution research in the urban environment for The New York Times. In part 1 of this interview, he talks about urban evolution

U.C. Berkeley School of Law professor Franklin Zimring talks about his article, "How New York Beat Crime," in the August issue of Scientific American

Nobel laureate Avram Hershko, who determined cellular mechanisms for breaking down proteins, talks about his research in a conversation recorded at the Lindau Nobel Laureate Meeting in Lindau, Germany. And Scientific American Editor in Chief Mariette DiChristina discusses the recent inaugural Google Science Fair

Peter Agre, 2003 Chemistry Nobel laureate for his work on aquaporins, the proteins that allow water into and out of cells, talks about his research, his upbringing and why he almost ran for the Senate, in a conversation recorded at the Lindau Nobel Laureate Meeting in Lindau, Germany

Scientific American math and physics editor Davide Castelvecchi revisits the Monty Hall problem, so you can know whether you're better off holding on to your original pick or switching when new information presents itself

Award-winning author Douglas Fox talks about his cover story in the July issue of Scientific American on The Limits of Intelligence, placed there by the laws of physics