MER - Mars Exploration Rovers
NASA's twin robot geologists, the Mars Exploration Rovers, launched toward Mars on June 10 and July 7, 2003, in search of answers about the history of water on Mars.

Cassini-Huygens
The Cassini-Huygens spacecraft is currently exploring the ringed planet, its mysterious moons, the stunning rings and its complex magnetic environment.

Mars Odyssey
In its extended mission, Mars Odyssey continues to map chemical elements and minerals on the surface of Mars and to monitor changes at the surface for another Mars year.

MRO - Mars Reconnaissance Orbiter
NASA's Mars Reconnaissance Orbiter (MRO) launched in 2005 and is on a search for evidence that water persisted on the surface of Mars for a long period of time.

MSL - Mars Science Laboratory
The Mars Science Laboratory (MSL) mission is scheduled to land a rover on Mars in 2012, with the goal of assessing the past and present habitability of the area it explores on Mars.

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