Water-bearing minerals were discovered on Mars by NASA’s Curiosity Rover.
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The Opportunity Mars rover sent its last signal to Earth.
NASA's Mariner 9 became the first spacecraft to orbit another planet when it entered Mars' orbit.
NASA lost contact with the Mars Observer spacecraft.
NASA launched the 2001 Mars Odyssey space probe from Cape Canaveral.
NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
