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TIL: Fire Hyrdants have different colors that actually mean something

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vPXox TIL of Ye's Optical Lattice Clock. It loses one second every 15 billion years, making it the world's most accurate clock.
yQv8e TIL that a man named Joseph Bolitho Johns (Moondyne Joe) escaped prison so many times that a special secure prison was built for him. A confident jailor said "if you get out again, I will set you free". Moondyne escaped that as well. He was caught again two years later but jailor kept his word.
jRZj TIL the “Nation” referred to by the National Hockey League (NHL) is Canada
a8YdZ TIL that Bismuth, the active ingredient in Pepto-Bismol, technically has no stable isotopes - however its most stable and common isotope has a half-life more than a billion times the age of the universe. (Some more facts in the comments)
4X7RX TIL of the Amish subgroup called Renno Amish where the men are allowed to wear only one suspender.