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Hot air rises is the principle behind the hot air balloon, which uses a nylon, flame-resistant balloon to catch hot air coming from a fire below it. Invented in 1783 in France, the hot air balloon was man's first flight. It's especially good at climbing to high altitudes. A hot air balloon once flew 69,852 feet up in the air, almost 57,000 feet past the level of usable oxygen in our atmosphere.