NASA announced that they found running water on Mars.
The discovery was made by NASA’s Mars Reconnaissance Orbiter.
Source
NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
NASA's Curiosity rover landed on Mars' Aeolis Palus plain.
NASA launched the Mariner 4 space probe on a mission to Mars.
Saturn, Jupiter, and Mars came into alignment. Medieval scholars believed this phenomenon brought forth the Black Death.
Viking I lands on Mars.
