These Rocks Are Petrified Lightning

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Although they form in an instant when lightning strikes, fulgurites are critical clues to how the world changed over thousands of years.

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Sources: docs.google.com/document/d/e/2PACX-1vRvUoHlUqGLDzoxP4t0eKaPU0y6IbsJzZjks2GbRbNeOOzl0vK5crlAYqqFv7-uO8v9Ck2-9cCFLg4N/pub