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TIL modern day Japanese swordsmiths are required by law to use traditional Katana forging techniques, despite the fact that modern day steel does not need to be folded multiple times.

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eprBJ TIL in the 1960s, science fiction author Stanisław Lem came up with several terms for technologies like "phantomatics" for virtual reality, "molectronics" for molecular nanotechnology, "cerebromatics" for cognitive enhancement or "intelectronics" for artificial intelligence.
MeJv0 TIL that Alan Smithee was the official pseudonym film directors used when they wanted to disown a project.
4kOQX TIL the Story of Mihailo Tolotos, the Greek Monk Who Lived a Lifetime Without Seeing a Woman
5YBnk TIL Scottish Musician Les Harvey of the band Stone the Crows was electrocuted in front of a live audience in 1972 when he touched an un-grounded microphone cable and his guitar at the same time.
wLDl1 TIL that rats can see the pain in other rat's faces and are empathetic.