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TIL that a rock is composed of two or more minerals, while a mineral is composed of the same substance throughout.

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QNEXk TIL In March 2021 Facebook suddenly removed the page for Bitche, the capital of Pays de Bitche, France. After complaints Facebook restored the page and apologized to the town.
XENME TIL of a "body farm", where the decomposition of human corpses is studied by leaving bodies outside in a variety of topographic and climate conditions. There are facilities in US, Canada, Australia, India, and UK. Over 100 bodies are donated to the University of Tennessee facility alone every year.
gMXNA TIL that the city of Detroit sits on top of a working salt mine, and that the mine has provided road salt for most of North America since 1910.
N7N78 TIL that after being told a jet powered car can run on anything that burns, the President of Mexico rode it running on tequila.
grw1A Til that the designer of the SS rune symbol was only paid about $2 for his design.