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TIL that in 1933-34, with immense pressure on banks, the city of Detroit printed their own banknotes to allow employees to be paid, as well as utilities.

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KJO9 TIL that there is another kind of lightning inside thunderstorms, called as “dark lightning” It expels antimatter and radioactive gamma rays.
8eQWP TIL that text messages have been sent electrically since at least 1774 when George-Louis LeSage sent static charges between two rooms in his house via 26 wires, one for each letter of the alphabet.
5yYR TIL it costs $10,000 per pound for NASA to launch a payload into orbit. NASA’s Advanced Space Transportation Program is developing technologies to reduce this to $100 per pound by 2025.
DboV TIL that Australia and England have competed for cricket trophy “the ashes” 64 times since 1884. The score is currently 32-32
J45j TIL the word “dude” was 19th century slang for a dandy and was likely shortened from “doodle” as in Yankee Doodle Dandy.