Water-bearing minerals were discovered on Mars by NASA’s Curiosity Rover.
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NASA's Mars Odyssey completed its 60,000th orbit around Mars.
NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
The USSR launched the Mars 7 spacecraft from the Baikonur Cosmodrome in modern-day Kazakhstan.
The famous Face on Mars photo is taken.
Mars made its closest approach to Earth in nearly 60,000 years.
