life

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.

A description of the chemical make-up of life on Earth, portrayal of aliens in Hollywood, and the search for evidence of life beyond Earth.

A description of the ultimate fate of the Earth, Sun, and the universe.