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The Soviet Union launches Sputnik.
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Two female monkeys named Able and Baker are launched by the U.S. and came back alive.
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The Soviet Union sends Yuri Gagarin into space.
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The Soviet Union puts Valentina Tereshkova into space, making her the first woman in space.
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Alexei Leonov from the Soviet Union does the first space walk.
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American Neil Armstrong is the first man to set foot on the moon.
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Russia launches the first space station, Salyut.
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Bruce McCandless becomes the first person to do a spacewalk without being attached to a spacecraft.
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Assembly of the ISS begins, its first module, Zarya, launches.
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Dennis Tito pays $20m to board the ISS for 8 days.