Life's Little Essential
Everybody knows that liquid water is necessary for life, at least as we know it. But just why exactly?

Ask the Expert
Dr. Leslie Tamppari of the Mars Phoenix Lander mission answers viewer questions.

"Live" From Mars
Read Twitter feeds from Phoenix, the rovers, and the Mars Science Lab.

Behind the Scenes
Mark Davis, producer of "MARS Dead or Alive," recalls filming alongside the rover team between 2002 and 2004.

Man on a Mission
In this January 2003 interview, lead scientist Steve Squyres reveals his hopes and fears for the rovers.

Mars From Afar
See some of the finest images ever taken of the martian surface, including Phoenix's most famous.

Mars Up Close
In late 2004, Steve Squyres narrates this visual tour of some of the rovers' most revealing discoveries.

Anatomy of a Rover
Examine the robotic geologists and their suite of scientific instruments.

Design a Parachute
Create a parachute strong and light enough to safely slow the rovers in their descent toward Mars.

From Launch to Landing
Watch two animations, one each of Spirit and Phoenix, showing their fantastic journey from Earth to Mars.

Martian Weather
Is the weather on Mars anything like the weather on Earth? Find out in this video.