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TIL That Ancient Romans Used Urine for Teeth Whitening and Laundry

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vPbpK TIL that it is illegal to place the Philippine flag below a framed picture, as it is seen as disrespectful to a national symbol.
Aryn TIL French Queen Marie Antoinette had a fully functioning peasant village built on the grounds of Versailles. She loved strolling the village in simple shepherdess garb pretending to live a simple life milking cows or sheep, which were carefully maintained and cleaned by the servants.
AN8da TIL that under the Internet Assigned Numbers Authority Service Name and Transport Protocol Port Number Registry, port 666 is (by default) reserved for a service called “mdqs”, alongside Id Software’s game DOOM.
wo441 TIL: Some mountain ranges are off-limits to climbers for religious reasons — for example, Mount Meili in the Tibetan regions of China.
XE8dP TIL that Mount Kailash in Tibet is considered to be sacred in four religions: Hinduism, Bon, Buddhism, and Jainism. Due to its religious significance, Kailash remains an unclimbed mountain.