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TIL blood is often red, but also blue, green and clear, depending on how oxygen is transported around the body.

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GYQb7 TIL that a DC man with the license plate “NO TAGS” has received $20,000 in tickets due to his plates being the same phrase police use to ticket unregistered cars.
KYvoB TIL that Dr. Josef Mengele, the Nazi war criminal who did barbaric medical experiments on Auschwitz prisoners, survived WW2. In 1979, he drowned in Brazil, where his skeleton is now used as an educational aid at medical school.
BgKPK TIL due to her commitment to Scientology, actress Kirstie Alley decided not to reprise her role as Rebecca Howe on any episode of the Cheers spinoff Frasier, because the series was centered on the field of medical psychiatry.
dDW19 TIL The Beatles opened for Little Richard before they had a record deal, The Rolling Stones opened for him as unknowns, Jimi Hendrix started in his band, and James Brown's big break was as a Little Richard impersonator playing shows Little Richard couldn't attend.
wLjx6 TIL anything obtained in space and brought back to earth is the legal property of whoever obtained it, and big tech/space companies are already trying to salvage asteroids, meteors, and comets for valuable elements