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TIL the word "quarantine" is derived from the 40-day isolation period for ships during the Great Plague of London

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78MGr TIL of the Salem Hypothesis which is based on the observation that people who claim scientific expertise, whilst advocating creationism, tend to be engineers. The hypothesis postulates that engineering predisposes people to creationism (with the sole exception of chemical engineers).
D1Alp TIL when James Cameron was an unknown director, he sold the rights to "The Terminator" for $1 so that he would be allow to direct the movie.
WkGmY TIL Jupiter's Great Red Spot is so loud that its soundwaves move so rapidly they heat the surroundings up nearly 700⁰F or about 370⁰C.
0noR TIL the word “plankton” is plural and “plankter” is the individual noun.
KYR96 TIL: Male echidnas have a four-headed penis — during mating, the heads on one side "shut down" and do not grow in size, while the other two are used to release semen. Each time it copulates, it alternates heads in sets of two. Prior to 2007, no one had ever seen an echidna ejaculate.