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TIL Facebook is cited as a factor in 20% of US divorces

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MewvA TIL the author of the book, "I Kissed Dating Goodbye," a evangelical book on the absence of all physical contact before marriage; would eventually denounce his book, leave the church he pastored, and divorce his wife.
yQ61l TIL the bronze bull (or brazen bull) was a torture/execution bull-shaped device. The condemned were locked inside, fire set under, heating metal until they're roasted to death. An acoustic apparatus converted screams into the sound of a bull.
nWy9r TIL the idea of a "World Turtle" is centuries old, inspiring the Discworld novel series, as well as the phrase "turtles all the way down"
VB7dp TIL the $327.6 million Mars Climate Orbiter was lost in 1999 due to a unit conversion error. NASA's team used metric units, while Lockheed Martin used Imperial units for calculations, causing the spacecraft to enter Mars' atmosphere too low and burn up.
lopZA TIL about Project Pigeon where psychologist B.F. Skinner developed pigeon-guided missiles for World War II. He put pigeons in the nose cones of missiles and trained them to peck at targets. It was effective but never got off the ground because nobody took them seriously and radar became popular.