The science of keeping a torch alight
[Times - World
] - 9. Maggio 2008 - 23:37To keep the Olympic torch burning at the summit of Everest, Chinese engineers have had to overcome two main challenges: the weather and the atmosphere. Average temperatures range from minus 36C (-33F) in January to minus 15C in July, and it is also buffeted by jet-stream winds that can reach hurricane force.
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