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TIL Ray Bradbury's story a sound of thunder predates the theory of the Butterfly Effect, but uses a butterfly to make the same example of chaos theory....

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PYQ4J TIL the classic Peanuts football gag ended on October 24, 1999. In the final strip, Rerun held the football instead of Lucy and whether or not Charlie Brown kicked the football was never revealed.
Yj0x TIL beards and long dresses fell out of fashion during the 1900s due to public health campaigns about spreading tuberculosis and other infectious diseases. Prior to germ theory and vaccines, people thought beards and fabric protected against miasma and “bad air”.
nWKJr TIL It's illegal to own gerbils, ferrets and hamsters as a pet in Hawaii.
woOLE TIL that before the 1920s there were nearly no regulations for a passport photo.
OZbR TIL that Pope Pius XII, who is often criticized for not speaking forcefully against Hitler, supervised a rescue network which saved 860,000 Jewish lives - more than all the international agencies combined.