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TIL that as well as the Oz books, L. Frank Baum wrote a newspaper comic strip called "Queer Visitors from the Marvelous Land of Oz", in which the Scarecrow, the Tin Man and others visit cities of the United States.

4kEKX TIL during the Cold War the US government stored opium and morphine at Fort Knox and the West Point Mint, to ensure the nation had adequate supplies in case of war or other supply disruptions. The stockpile was enough to meet the painkiller needs of the United States for one year.
b6MW4 TIL of Captain Citrus, a fictional mascot based on Captain America from the Florida Department of Citrus, a state body tasked with promoting Florida's orange industry. Created in 2011 as "Ollie the Orange", Florida paid Marvel around $1 million in 2014 to redesign and publicly promote the character.
WEGB TIL ‘Playboy’ once featured a short story about heterosexual men being persecuted in a world where homosexuality was the norm. In response to angry letters Hefner wrote, “If it was wrong to persecute heterosexuals in a homosexual society then the reverse was wrong, too.”
E1Kv0 TIL Scientists trained 17 rats to drive tiny cars; each rat stood on the aluminum floor of the car & gripped copper bars with their paws to complete a circuit to propel the car. By touching left/center/right on the bar, rats could steer to pick up rewards of Froot Loops morsels in the arena.
GALX4 TIL Carbon black is the chemical material added to tires that imparts not only their Black color but also helps increase their durability. Moreover, it conducts heat away from the tread and belts of the tires, which also promotes extending the lifespan of the wheels.