NASA announced that they found running water on Mars.
The discovery was made by NASA’s Mars Reconnaissance Orbiter.
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The Indian Space Research Organization's Mars Orbiter Mission probe reached Mars' orbit after 298 days.
The Viking 2 became the second spacecraft to land on Mars.
Water-bearing minerals were discovered on Mars by NASA's Curiosity Rover.
Mariner IX took two photos of Mars' north pole.
Saturn, Jupiter, and Mars came into alignment. Medieval scholars believed this phenomenon brought forth the Black Death.
