Earth-like calcium-rich deposits were found on Mars by NASA’s Curiosity Rover.
Source
One of Mars' moons, 'Deimos,' was discovered by an American astronomer, Asaph Hall.
NASA declared the conclusion of the Phoenix mission after contact was lost with the Phoenix lander.
NASA lost contact with the Mars Observer spacecraft.
NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
The famous Face on Mars photo is taken.
