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TIL the reason why older Japanese paints have women with black lips is not to provide contrast, but because they actually represent black teeth which was a common custom of the time.

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KYLZE TIL senior citizen Emerich Juettner eluded the US Secret Service for 10 years while he used just enough poorly created counterfeit $1 bills (one version misspelled Washington) to support himself & his dog. He only used fake $1 bills one at a time & never to the same place twice. He'd serve 4 months.
4knPR TIL Ameland island, Netherlands, eliminated red in the light spectrum of streetlights and nearby offshore platforms since migrating birds took the cue to communicate all night long, and disoriented birds' internal compasses causing exhaustion. Blue-green lights increase migratory bird survival.
4k9Ka TIL that the plumber wrench and the adjustable wrench were both invented by the same person, a Swede from a family of tenant farmers.
4XA7a TIL Albert Hofmann, the discoverer of LSD, could not imagine anyone using the drug recreationally due to its intense and introspective nature.
0g5y TIL that spacecraft designers have to contend with a poorly-understood phenomenon known as “cold welding” where clean metal surfaces can spontaneously weld themselves together in the vacuum of space.