On May 27, 1931 Auguste Piccard and Paul Kipfer reached an altitude of 15.8 km (51,775 ft) in a balloon. The air density at that altitude is very low so they needed to travel in a pressured gondola. The air at that altitude is also very cold. How were they able to stay warm?
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On May 27, 1931 Auguste Piccard and Paul Kipfer reached an altitude of 15.8 km (51,775 ft) in a ball...
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