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TIL Human urine is actually beneficial to plants and can be used as a natural fertilizer because of its composition of nitrogen, potassium and phosphorus.

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E1AjX TIL about the Brooklyn Theater Fire in which none of the staff or actors yelled "Fire" because they were afraid of causing a panic and 278 people died.
yOZw TIL George Lucas’ daughter and the Green Ranger are MMA fighters
epVrE TIL in 2009 Burger King ran the "Whopper sacrifice" campaign, which gave a free whopper to anyone who deleted 10 friends on Facebook. Facebook suspended the program because Burger King was alerting people letting them know they'd been dropped for a sandwich
KYBdB TIL that in 1538, King Henry VIII of England demolished the entire village of Cuddington in Surrey to build Nonsuch Palace. The palace had yet to be completed when Henry VIII died in 1547, and was sold to and finished by Henry FitzAlan, 19th Earl of Arundel in 1556.
OGxA6 TIL that in 1900, a physician named Jesse William Lazear wanted to prove that yellow fever was transmitted by mosquitoes. He allowed an infected mosquito to bite him, and he became infected with yellow fever, proving the hypothesis correct. He died 17 days later.