Mysterious Clouds that Shine at Night
I just learned of a strange new thing called a noctilucent cloud; evidently they are an enigma and scientists don't know much about them. Check out these pictures; note that these are all taken at night:
![](http://codinginparadise.org/weblog/images/cloud2.gif)
![](http://codinginparadise.org/weblog/images/cloud1.gif)
Brad Neuberg's Weblog
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