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TIL about a top secret WWII effort to create a horrible smell that spies could spray on German and Japanese officers to demoralize them and their troops. The project's code name was "Who, me?".

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nWjZo TIL that the MPAA, the organization that rates movies in the U.S., is not a government entity. It’s a private organization that lobbies on behalf of the big 6 Hollywood studios and has very shady ethical practices regarding movie ratings.
WkKXA TIL in the early 1890s one man released 100 European Starlings in New York City, which have grown to 200 million today as an invasive pest. The story goes he wished for all birds mentioned in Shakespeare's works to reside in America.
Kep9 TIL Only very tiny amounts of the chemical in trick noisemakers can be prepared at once, as even the weight of the crystals can cause them to self-detonate.
A4pg TIL that the 19th century London campaign for sanitary reform and delivering clean water was opposed by critics as “a deduction from the charms of freedom.” The Times daily argued it was preferable to “take a chance with cholera than be bullied into health.”
R71Vj TIL There's Evidence Humans Didn't Actually See Blue Until Modern Times