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TIL Pink has no corresponding wavelength, it’s our brains filling in the gap between ultra violet and infra red light in the color spectrum. Put simply, pink is what you get when you remove the color green from white light.

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a80E9 TIL In the country of Georgia you can undergo treatment for bacterial diseases using viruses called Bacteriophages, which have shown potential as a solution to antibiotic-resistant bacteria.
Bx6L TIL there is a waterfall known as “The Devil’s Kettle” where the water vanishes in a pothole, people have thrown dyes, logs and other things into it and have been unable to find where it goes.
e0wab TIL that there is a worldwide farmer suicide crisis. A CDC study found that farmers take their lives at a rate higher than any other occupation.
xVwm5 TIL that Syria cuts out the internet during the high school examinations
LQ0r0 TIL about “Old Sparky”. Tennessee’s electric chair is over 100 years old and is reportedly made from the wood of the former gallows