A conversation about the origins of the universe, life on Earth and in the cosmos, and a few of the astrophysical challenges confronting scientists today.
A conversation with Dr. Richard Berendzen of American University and astrophysicist Neil deGrasse Tyson of the Hayden Planetarium about NASA's trip to Mars and the significance of analyzing the planet's rock samples.
A conversation with Ed Weiler, director of NASA's origin program, Michael Lemonick, author of "Other Worlds" and Neil Tyson, the director of the Hayden Planetarium, about the possibility of life on other planets and NASA's program that explores the question.