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TIL that Dr. James Barry, a celebrated surgeon, was born Margaret Bulkley and adopted a male persona to become the UK’s first female doctor, carrying out the first successful caesarean delivery. She fooled the Army, high society & the whole British Empire. This secret was only revealed after death.

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1aPLV TIL: Olympus Mons on Mars is so big the escarpment, or cliffs, around the base of the mountain are as high as 6 miles tall, which is taller than Mt. Everest, which for reference is only about 5.5 miles tall.
ymAv TIL on a clear dark night the human eye can detect a candle being lit from 30 miles away.
oRK8R TIL that the said exorcism case which inspired the 1970s novel and movie 'The Exorcist' was supposedly performed on an 14 yeard-old boy in St. Louis in 1949. According to some reports, he passed away in 2020 and worked as an NASA engineer until 2001, contributing to the Apollo Program.
lKEB TIL that the CIA carried out a terrorist campaign against civilian Viet Cong sympathizers in which over 26,000 were killed while some 55,000 others were captured and subjected to rape, electrocution, maulings, and other torture.
RJwj TIL that war pigs were used in ancient warfare, to counter against war elephants, which feared the pigs (and their squeals) and would bolt. War pigs were sometimes lit on fire to enhance this effect.