Trivia.com
Hot air balloons are powered by the same principle that lifts smoke.
Trivia.com
Hot air balloons can fly without an engine.
Trivia.com
Hot air balloons carried humans before airplanes existed.
Trivia.com
Hot air balloons flew before trains became common.
Trivia.com
Hot air balloons helped humans leave the ground for the first time.
See also
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