A team of NASA scientists declared that the Martian ALH 84001 meteorite might contain traces of alien life.
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NASA launched the 2001 Mars Odyssey space probe from Cape Canaveral.
Mars had a 'close encounter' with Earth at 34.8 million miles apart.
Saturn, Jupiter, and Mars came into alignment. Medieval scholars believed this phenomenon brought forth the Black Death.
The US Mariner 9 was launched – it went on to become the first satellite to orbit Mars.
The Opportunity Mars rover sent its last signal to Earth.
