Water-bearing minerals were discovered on Mars by NASA’s Curiosity Rover.
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A team of NASA scientists declared that the Martian ALH 84001 meteorite might contain traces of alien life.
After seven months of travel, the Mars Reconnaissance Orbiter arrived safely to Mars.
NASA's Pathfinder Space probe landed on Mars.
Mars made its closest approach to Earth in nearly 60,000 years.
Asaph Hall discovered Mars' second moon, called Phobos.
