Petrified Lightning: Natural glass formed by lightning strikes is called fulgurite. It is creat
Petrified Lightning: Natural glass formed by lightning strikes is called fulgurite. It is created when a lightning strike hits a sandbank, blowing a super-heated hole right through it. This quickly cools into a beautiful glass. The name comes from Latin fulgur, or lightning. (Image credit to flickr, Carion Mineraux, and Nature. Thanks Grandma.) -- source link
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