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TIL that humans are bad at face recognition and almost can't distinguish unknown people apart.

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Mal7 TIL Treehouse attachment bolts are specialized bolts engineered for treehouse construction. Since treehouses are subject to frequent load reversal produced by winds, TABs must be made of spring steel. The bolts are able to support from between 9,000 and 12,000 pounds
5QLr TIL that Matt Cvetic, a Pittsburgh steel mill worker, was hired by the FBI to infiltrate the Communist party for nine years. His cover was so good that even his own family didn’t know he was undercover and despised him for his beliefs.
lokw5 TIL that a large number of PlayStations are being assembled and packaged in an almost fully automated factory in Japan rather than by cheap labor in China. One PlayStation can be assembled every thirty seconds in a factory with only four people.
RW9j TIL The oldest console video game world record was set by Todd Rogers on “Dragster” for the Atari 2600 in 1982. According to the game’s programmers, the fastest possible time coded was 5.54 seconds. Rogers finished in 5.51.
kO4j7 TIL Marvin Gaye’s real last name was “Gay”. His father was a crossdresser, making Marvin a target of bullying. It was because of this, added with rumors of Marvin's own homosexuality, that Marvin added an "e" to his last name when he became famous.