ultrafacts: The balloon, filled with 7,815 litres of helium gas, reached 37,339 metres (122,503 feet) before it burst and fell back down to earth. It took about 2.6 hours to rise up to this height and then only 40 minutes to fall back down and land
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ultrafacts: The balloon, filled with 7,815 litres of helium gas, reached 37,339 metres (122,503 feet) before it burst and fell back down to earth. It took about 2.6 hours to rise up to this height and then only 40 minutes to fall back down and land
