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TIL Pennsylvania’s Seal has a reverse side, which depicts Liberty holding a wand topped by a liberty cap. In her right hand is a drawn sword. She is “trampling upon tyrrany, represented by a lion.” The entire design is encircled by the legend "Both Can't Survive.”

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p8lZZ TIL the usage of diammonium phosphate allowed Marlboro to free base the nicotine in tobacco, allowing for more efficient delivery. Marlboro kept this process secret for many years, as freebasing is the same process used to produce crack cocaine from normal cocaine.
rRDaM TIL that former Former President Benjamin Harrison’s daughter, Mary Harrison McKee, served as First Lady after Benjamin Harrison’s wife died while he was in office
gMGd8 TIL that Burying the dead has been illegal in San Francisco since 1901. Because space was limited and real estate at a premium even back then, the city outlawed burials and moved all cemeteries to neighboring Colma, CA.
KOMV6 TIL that the BTK serial killer Dennis Rader, who killed 10 people between 1974 and 1991, was finally caught after sending a 1.44MB diskette to the police - which they told him was untraceable - containing metadata from a deleted MS Word file.
E1087 TIL that the American flag deployed on the moon during the Apollo 11 mission was inserted only seven inches deep and was placed about 27 feet from the Eagle landing craft. As a result, it was blown over by the blast of the rocket exhaust during the takeoff back to Earth.