The European Space Agency has teamed up with Russia’s Roscosmos program to land a spacecraft on Mars on Wednesday, October 19.

If they stick the landing, they’ll join NASA as the only space agencies in history to successfully land a spacecraft on Mars. And that will only be the beginning — the lander will then start a whole new quest to search for signs of life on the Red Planet.

If the landing is a success, it will actually see the agencies put one spacecraft up into Mars’s atmosphere, and one onto its surface, giving scientists a rare opportunity to record conditions above and below the planet simultaneously.

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