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TIL that 3D glasses were invented in 1838 by Charles Wheatstone.

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via reddit.com

rNLV4 TIL that in 2002, two planes crashed into each other above a German town due to erroneous air traffic instructions, killing all passengers and crew. Then in 2004, a man who'd lost his family in the accident went to the home of the responsible air traffic controller and stabbed him to death.
dDZX8 TIL it is hypothesized humans self-domesticated ourselves by systematically killing actual “alpha” males that tried to dominate groups.
J1Nw1 TIL, Calvin Klein's cologne 'Obsession' can draw big cats like Tigers, Jaguars etc from as far as half a mile, who then proceed to taking long sniffs and cuddling against the source, savouring the smell much longer than they savour even their meals
9w7mX TIL that Wally "Famous" Amos first worked as a talent agent and signed Simon & Garfunkel. He would attract clients by sending them chocolate chip cookies along with an invitation to visit him.
MeV57 TIL as of 2016, Giant Pandas are no longer classified as an endangered species.