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TIL the tritone was never banned by the Catholic church; it was called "the devil in music" in one medieval music theory text because its vibrations made it technically difficult to sing. The tritone was not literally associated with the concept of evil until Black Sabbath popularized the myth.

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xK4b TIL of an art movement called “Rock Balancing” which involves the stacking of rocks in what often appear to be impossible positions, without the use of adhesives or outside support.
rRWme TIL about Roselle, a seeing-eye dog that led her blind owner, Michael Hingson, down 1,463 steps from the 78th floor of the North Tower of the World Trade Center on September 11th, 2001. Dog and owner exited just before the South Tower collapsed, and both survived.
DmNe TIL of María Santos Gorrostieta Salazar, the mayor of Tiquicheo Mexico, survived three assassination attempts and despite her wounds refused to resign. In 2011 her term as mayor ended and her police protection was withdrawn. In November 2012 she was abducted, stabbed and brutally beaten to death.
EBEw TIL of Ewa Wiśnierska, a German paraglider that survived lightning, pounding hail, -40°C temperatures and oxygen deprivation after a storm system sucked her to an altitude higher than Mount Everest.
LQmeQ TIL about Michael Larson, an ice-cream man who in 1984, appeared on the game show “Press Your Luck” having memorized the five pre-determined board cycles and after over 40 spins, won over $100,000 and several holidays.