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TIL that sound forensics make it possible to reconstruct speech or other sound by watching leaves of a plant, earbud speakers or a potato-chip bag with a camera, even through soundproof windows.

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NXyVb TIL about the Leaning Tower of Niles, a half-scale replica of the Leaning Tower of Pisa, located in Niles, IL and completed in 1934.
VwYB TIL - Cats Respond Most Readily to Names that End in an “ee” Sound
YO6A TIL of the ‘Secret War’, where the CIA recruited 50% of the Hmong population to fight for the US in the Vietnam War. Afterwards, they were completely abandoned.
XEQO6 TIL about "Bat-boy: The Musical", an off-broadway production based off of the infamous 1992 Weekly World News article. Keythe Farley, who co-authored the musical, is well known as the voice of Thane Krios in the Mass Effect series.
oBEm8 TIL that during D-Day invasion of Normandy by the allied forces, German commanders wanted to send the armored (Panzer Tanks) division to stop them. They had to wait for the order from Hitler because he was sleeping at the time and didn't want to be disturbed. When he woke up, it was too late.