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TIL McDonalds serves biscuits and gravy in select areas.

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QNZjk TIL that in World War 2 Nazis used secret codes to communicate using a machine called the Enigma Machine which would use morse code but make it very, very difficult and there was a building in England where many people were recruited to work as decoders and it would take hours or days to solve.
QJxW9 TIL that it costs between $116,000 and $263,000 to open a Subway. In contrast, it costs between $1 million and $2.2 million to open a McDonald's.
GAVX5 TIL that the dude who wrote the “…for dummies” book series is the real-life basis for the nerdy character “Mark Ratner” in “fast times at ridgemont high”
epyP5 TIL of the Glasgow effect, a term which refers to the lower life expectancy of residents of the Scottish city compared to the rest of the UK and Europe. Some hypotheses for this effect include stress, especially in childhood, leading to ill health; violent gang culture; and rate of premature births.
vYG7 TIL that a compound called ClF3 oxidizes so well that it will spontaneously ignite upon contact with nearly all matter including ash, metal, glass, sand, and teflon. It reacts explosively with water, forming HF and HCl, and does not need oxygen to burn.