Spaced Out: Space Shuttle Quiz

At its best, the space shuttle is the embodiment of 20th-century scientific progress, a stunningly complex vehicle that can lift into space, orbit the Earth, return to Earth's atmosphere, and be re-used in a matter of weeks. At its worst, the shuttle is a symbol of the dangers that come with space travel. How did the shuttle program begin? And what keeps astronauts alive in the depths of outer space?

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