Read more: http://environment.newscientist.com/article/dn14581?DCMP=youtube Researchers analysed flashes of light in the upper atmosphere, called elves, sprites, halos and jets, to see how often and where they appeared.
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YouTube | August 21, 2008
Tags:. .light. .read. .appear. .research. .flash
Analys Appear Articl Atmospher Elv Environ Flash Halo Jet Light Newscientist Often Read Research Reveal Sprite Upper