In 1972, "Apollo 16" astronauts John Young and Charles Duke explored the surface of the moon.

CNN: Sunday,

Apollo 16 and Apollo 17 carried biology experiments known as Biostacks 1 and 2 beyond these belts (the moon is about 400, 000 kilometers away).

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With less than six months to go to meet that deadline, on July 16, 1969, Apollo 11 roared off the pad.

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