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The highest anyone has ever flown in a hot-air balloon is 68,986 feet, nearly twice the altitude of commercial airliners. At those heights, the people in the basket need to wear oxygen masks.
Posted >1 y ago
Responses: 3
Actually they have taken hot air balloons nearly twice that high. https://www.google.com/amp/s/http://www.space.com/amp/17961-supersonic-skydive-worlds-highest-space-jump.html
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No, they need a pressure suit. At 63,000 feet, blood boils at normal body temperature.
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