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?