Would a balloon float on Mars?

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  1. #small
  2. #earth
  3. #there
  4. #atmosphere
  5. #would
  6. #itself
  7. #mostly
  8. #buoyant
  9. #hydrogen
  10. #helium
  11. #float
  12. #could
  13. #problem
  14. #balloon
  15. #neutrally
  16. #jupiter