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TIL about the Sodium Vapor Process used in filmmaking. In 1965, the Academy Award for Best Visual Effects, was awarded to the film Mary Poppins.

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aeK9 TIL that in 1987, a prison inmate, Ronnie Lee Gardner, broke a glass partition and knocked out the lights in the prison visiting area to have sex with a woman who was visiting him. The other inmates cheered and barricaded the doors. Gardner later claimed breaking the glass was an accident.
gM8v8 TIL That Golden Gaytime, a popular Australian ice cream treat, has the slogan "It's hard to have a Gaytime on your own".
b9Oop TIL that the first vending machine was invented 2000 years ago in Roman Egypt and sold Holy Water. When the coin was deposited, it fell upon a pan attached to a lever which let some water flow out. A counterweight snapped the lever up and turned off the valve once the coin was tilted off the pan.
0d1JM TIL in 1831 four countries claimed a new island in the Mediterranean that disappeared again only six months later
KObQE TIL that the crazy colors and patterns you see when you rub your eyes are called "PHOSPHENES." Researchers believe that this "biophotonic light" actually comes from inside of our eyes in the same way that fireflies emit light.