Astrospies (Feb. 2008)

An elite corps of secret U.S. astronauts is trained to gather intelligence on the Soviets during the Cold War. Watch now (49 mins.)

Hubble's Amazing Rescue (Oct. 2009)

The unlikely story of how the world's most beloved telescope was saved. Watch now (50 mins.)

Hunt for Alien Earths (July 2009)

Astronomers may be on the brink of finding Earth-like planets beyond our solar system. Watch now (15 mins.)

Is There Life on Mars (Dec. 2008)

The decades-long search for life on the Red Planet heats up with the discovery of frozen water. Watch now (50 mins.)

Moon Smasher (July 2009)

A NASA satellite called LCROSS heads to the moon in the hope of finding buried water. Watch now (15 mins.)

Origins: Back to the Beginning (Sep. 2004)

How did the colossal forces of the early universe make it possible for habitable worlds to emerge? Watch now (50 mins.)

Profile: Franklin Chang-Díaz (July 2009)

The first Latino-American astronaut is also a scientist designing a new generation of plasma-powered space vehicles. Watch now (15 mins.)

Space Shuttle Disaster (Oct. 2008)

An investigation uncovers the human failures and design flaws behind the 2003 Columbia tragedy. Watch now (50 mins.)

Sputnik Declassified (Nov. 2007)

Top-secret documents rewrite the history of the famous satellite and the early space race. Watch now (49 mins.)