› added 7 years ago

204

TIL: That the dewey decimal system, used to classify and order books in libraries, has one for Extraterrestrial History: 999. Aparently the guy who made this system in the 1800s was already prepared for an interplanetary/interstellar future for humanity

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gY6D TIL : Debeers created the biggest diamond scam in history, by inventing the diamond engagement ring and implementing them into movies to trick the working/middle class into investing in them.
l0k1 TIL Hubble can get detailed views of distant galaxies but not of Pluto
oJR7 TIL that Nixon sabotaged LBJ’s peace negotiations with North Vietnam.
NXAxe TIL why the traffic lights are red yellow green ; the first LED were ever created was red and then green was invented and the mix of two is yellow and the blue LED took 30+ years to get invented and thus creating RGB light and the modern color panels ..,
kJ8X4 TIL: The first helicopter used by the US in combat was during WWII, originally meant to ferry parts from ships to shore, they quickly realized how useful they were and used them for medevac purposes.