Mars had a “close encounter” with Earth at 34.8 million miles apart.
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A meteorite that landed in Australia in the 1960s revealed stardust up to 7 billion years old.
NASA's Pathfinder Space probe landed on Mars.
A team of NASA scientists declared that the Martian ALH 84001 meteorite might contain traces of alien life.
NASA launched the Viking 1 planetary probe toward Mars.
The Viking 2 became the second spacecraft to land on Mars.
