Do you know all the history and science behind SpaceX? Test your knowledge with this quiz at HowStuffWorks.
Author's Note: How Astronauts Work
The end of America's space shuttle program brought tears to the eyes of just about anyone interested in space travel. Happily, private companies have briskly brought their experience and financial brawn to space missions of all kinds. Rather than mourn the end of the government-driven era of space exploration, we can now cheer for corporations to achieve what public programs could not. The end result may be faster advances in both technology and knowledge.
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