Wow, so this is the math that saved Apollo 13. It's an amazing piece of American history.



  • Fact 1: Apollo 13, NASA's third manned mission to the moon, suffered an oxygen tank explosion 200,000 miles from Earth on April 13, 1970.
  • Fact 2: Astronauts Jim Lovell, Jack Swigert, and Fred Haise struggled for four days to survive and return their crippled spacecraft to Earth.
  • Fact 3: Among the many threats to their survival, the Apollo 13 astronauts faced lack of water, power failure, and carbon dioxide buildup.
  • Fact 4: Apollo 13's command module returned to Earth and splashed down safely in the South Pacific Ocean on April 17, 1970.
  • Fact 5: Following the Apollo 13 incident, Grumman Aerospace jokingly sent competing contractors a $400,000 bill for "towing" their failed equipment home from the Moon.

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