Mars

Interviewed on PBS's NewsHour with Jim Lehrer regarding the 2003 close encounter with Mars.

Host Robert L. Kuhn leads a discussion about life in the universe and the consequences of discovering life elsewhere in the universe.

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.

Water in the Solar System: where it's abundant and where it's absent.

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.