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TIL that the wounds of some Civil War soldiers glowed at night, supposedly gifting them with strange recuperative powers. It was known as “Angel’s Glow”.

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oRy18 TIL that all of the original "Mercury Seven" astronauts were the eldest or only sons of their family. All were raised in small towns & all were married w/ children. All were (white) protestants, and four were their fathers' namesakes. All had attended post-secondary institutions in the 1940s.
9RJm TIL As an experiment, a copy of Casablanca’s screenplay was submitted to 217 agencies under the title “Everybody Comes to Rick’s”. Out of the 85 that read it, only 8 recognized it specifically as Casablanca, and only 3 declared it as commercially viable.
Y6LB TIL that It’s a crime to mime in China
v1VJD TIL that Christopher Columbus never set out to the americas to prove the earth was round,. This myth was created 400 years later by the american story teller Washington Irvin, creator of tales such as “Rip Van Winkle” and “The Legend of Sleepy Hollow”
wLEBo TIL Tooth Enamel (apatite) is not hardest biomaterial, the hardest biomaterial belongs to the Gumboot Chiton, a marine mollusc that has teeth made of Magnetite