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TIL of ISO 3103, the international standard for brewing a cup of tea

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7N4x TIL that in order to prevent everything from being named after mathematician Leonhard Euler, discoveries are sometimes named after the first person AFTER Euler to have discovered them.
ANNjB TIL: The Jacob Diamond, estimated to be worth £100 million (2008), was used as a paperweight for a long time until the diamond's true value was realized
GZgg TIL Weird Al owes much of his success to a radio show host named Dr. Demento
yQOLe TIL that defectors from North Korea cannot change their mind: South Korea won't let them go back home, will arrest them if they try
dDPg9 TIL: About Pre-Code Movies which were "talkie" films made from 1929 to 1934 after a morality code that was put in place in 1930 was actually enforced in 1934.