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Today I learned about JIS-spec screws, which look an awful lot like Phillips-head screws, but the tools are not always interchangeable and can cause mechanics tremendous frustration.

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Meb67 TIL this yellow-pigmented male northern cardinal is most likely a genetic mutation that renders the pigments the bird draws from foods making it appear with yellow coloration rather than red. This is called xanthochromism; in addition to cardinals, it has also been seen in rose-breasted grosbeaks.
y0ee TIL George Washington is considered by most historians to have been a bad public speaker.
OoG8e TIL Keiko the Orca, of Free Willy fame, died after only about a year and a half after being fully released due to a failure to adapt to life in the wild. The project to free him cost roughly US$20 million.
ANaGB TIL that before Nirvana was formed, Kurt Cobain led a band called "Fecal Matter"
ADEgd TIL there's an American attorney who has been under house arrest for a year because of a contempt of court charge for failing to turn over his personal electronics to Chevron. The maximum sentence for his crime is six months.