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TIL Emilio Salgari, Italy's greatest adventure writer and the "Father of Spaghetti Western", never traveled outside Italy, all he knew about foreign cultures he learned from books and travel manuals.

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m1GpR TIL that Sea Urchins are called Sea Urchins because Hedgehogs used to be called Urchins until about the 15th century. Sea Urchins are Ocean Hedgehogs.
ep44J TIL that the Zodiac Killer supposedly wrote a complaint to the San Francisco Chronicle that the 1973 movie "Badlands" was "murder-glorification" and asked the paper to cut it's advertisements
D1yWv TIL of the Mt. Iimori monument, an ancient Italian column that survived Pompeii and was donated to Japan by Mussolini in 1928 to honor nineteen teenage samurai who mistakenly committed suicide on the mountain in 1868 after falsely believing their domain had lost a battle in the Japanese Revolution.
xVoek TIL about a 21-year old Georgia woman who took a 2 hour college exam while in labor in the hospital. Once finished she delivered a healthy baby.
XEj0R TIL feedback loops in Systems Theory. An example of feeback loops are birth rates( a reinforcing loop) and death rate( a balancing loop) all of which act on a giving population. Reinforcing loops enhance what is already existent( like a good investment) and balancing loops level things out.