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Rare and mysterious clouds that are so bright they can be seen at night have mystified people since they were first observed more than a century ago, but scientists have now discovered a key cosmic ingredient for these night-shining clouds: “smoke” from meteors as they burn up in the Earth’s atmosphere …. http://www.sott.net
2012-09-05 15:51:58
Source: http://luismmx.blogspot.com/2012/09/increased-meteor-smoke-noctilucent.html