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TIL: In 2011, new students at the Wabash College in Indiana were required to play the video game Portal as part of a course on what it means to be human. The course discussed how Portal's villain presents different versions of themselves, showing a public face, while hiding a different private face.

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9YMjQ TIL that the actors that played Ethel and Fred hated one another so much, that Vivian Vance (Ethel) once stated: “I loathed William Frawley (Fred) and the feeling was mutual. Whenever I received a new script, I raced through it, praying that there wasn’t a scene where we had to be in bed together.”
0wK7y TIL: Rome was basically a ghost town during the Middle Ages. After the fall of the West-Roman empire, the population of Rome dropped from 1MILLION in 330AD to just 20k in 650AD. The population remained roughly the same till ca.1600AD.
oBgYY TIL: The horror-comedy movie Scream was based on the real-life case of the Gainesville Ripper
v1Ev8 TIL that German WWI ace German pilot Oswald Boelcke was so respected by his peers that the British Royal Flying Corps dispatched an aircraft to drop a wreath over his home airfield. He was so influential that his dogfighting tactics are still used today in modern aerial warfare.
5VrGr TIL Whale songs can be used to map out the ocean floor