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This is What Happens When Sand Gets Struck by Lightning

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national geographic sand Fulgurite - 6752424960
Via: National Geographic
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Fulgurites are natural hollow glass tubes formed in quartzose sand, silica, or soil by lightning strikes (at 3,270 °F), which instantaneously melts silica on a conductive surface and fuses grains together over a period of around one second. Photographed by Ken Smith.

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