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TIL Argon‑Oxygen Decarburization—the main process behind 75% of the world’s stainless‑steel production—was invented in 1954 to remove carbon while preserving chromium using a mix of argon and oxygen gases

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kY54 TIL that an entire lake was drained by accidentally drilling into an underground salt mine pulling full size container ships into the hole.
9JYm TIL that the Great Pyramid was shiny like a glass 4,000 years ago.
OoajY TIL that NASA beamed the song “Why Can’t We Be Friends?” to Soviet cosmonauts and U.S. astronauts during the first joint U.S.–Soviet space flight in 1975 (The Apollo–Soyuz Test Project)
xVGVo TIL: Dedicated Japanese monks spent years going through the horrifying process of turning themselves into mummies... while still alive. Viewing their bodies is now one of the world's creepiest tourist attractions.
vWgL TIL of Tycho Brahe, an enormously rich 16th century Danish astronomer, who is well known for his pet moose that accompanied him everywhere and developed a strong taste for beer, eventually becoming so intoxicated at a party that it fell down a flight of stairs and died from subsequent injuries