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TIL the efficiency of LEDs doubles every 36 months.

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5YeeB TIL Andrew Carnegie gave away more than 90% of his wealth, with much of it going to found 2509 public libraries at an inflation-adjusted cost of more than $1.3 billion
aplJ TIL that civilian GPS in the 90’s was purposely designed to be inaccurate, due to a feature called selective availability (SA). This changed in 2000 when President Bill Clinton decided to turn SA off and GPSs around the world instantly became 10 times more accurate.
ODDa TIL almost all of The Hobbit’s character names were taken out of an old Icelandic poem “Dvergatal”
Y70r7 TIL Dave Coulier knew Alanis Morissette's "You Oughta Know" was about him when he heard the line "I hate to bug you in the middle of dinner" as she once called him after the break up and asked if she could call back because he was in the middle of dinner. When he heard it, he went "uh oh."
vRaL TIL Mark Knopfler would not allow Weird Al to parody his song “Money for Nothing” unless he was the one to play guitar on the parody.