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TIL in WW2 2/3 of all US pilots died during accidents and half of them were within the US

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kO5Od TIL that the cartoon/comic strip staples of censoring swear words with *!?#& symbols (grawlixes), using starbursts or circles above a character's head to denote drunkenness (squeans), and wavy rising lines to indicate steam or heat (indotherms) were all invented by one cartoonist: Mort Walker
7dgX TIL Biologists at Osaka University in Japan have discovered a new way to grow the many separate tissues that make up the human eyeball, including retinas, corneas, the eye’s lens, using stem cells extracted from a small sample of adult skin
KOyvw TIL penguins need their feet to be bare despite walking on ice. Their bodies are so well insulated that they need the freezing cold to help regulate their body temperature and keep it from overheating.
KYGvQ TIL there are more than 10 states of matter including time crystals
9YVrM TIL about Winston County, Alabama, which during the American Civil War attempted to cede from the Confederacy and become a free republic, as the lack of any plantations and resulting rarity of slaveholders in the region gave the locals little reason to sympathize with the rebel cause