Explore the vast reaches of space and mankind’s continuing efforts to conquer the stars, including theories such as the Big Bang, the International Space Station, plus what the future holds for space travel and exploration.
  • Aliens & UFOs
  • Astronomy
  • Future Space
  • Spaceflight
  • Space Exploration
  • Space Transportation Systems

Astronauts risk their lives in the pursuit of science. How does NASA know who can be an astronaut? And what do they do when they're not in space?

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