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TIL rust (corrosion) has an estimated worldwide annual cost of $2.5 trillions, roughly 3.4% of the global GDP

6EOkl TIL that Billy Joel's last hit "We didn't start the fire" that chronicled 40 years of US and World history in song was inspired by a discussion that Billy Joel had with Sean Lennon, the son of John Lennon and Yoko Ono. Sadly, only 5 of the 59 people that are mentioned in the song are still alive.
R779 TIL Scientists have actually performed “succesful” head/brain transplants. “When the newly attached monkey woke up, he tried to bite off the finger of an attending doctor, and everyone cheered.”
woOwo TIL that in 1939, African-American singer Marian Anderson was denied permission to perform at Constitution Hall by the Daughters of the American Revolution. The Hall had a white performers-only policy. Anderson responded by giving an open-air concert on the steps of the Lincoln Memorial.
xVdxw TIL the Soviet Union captured the first images of the far side of the moon in 1959 using radiation-resistant film recovered from a downed US spy balloon. This technology was essential to protect the film from radiation in space, and the Soviets were unable to produce their own at the time.
dpYd TIL of Thomas(ine) Hall– a hermaphrodite in Colonial America. A trial was held where it was ruled (s)he was both “a man and a woeman”, and, to conform to the strict gender roles of the time, (s)he was order to wear, at all times, a man’s shirt and pants with a woman’s apron and bonnet.