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TIL in pre-industrial times (before electricity) it was normal to get up for a couple of hours in the middle of the night, resume normal activities and then return back to sleep until morning.

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WkWYB TIL about Cryptophasia, or 'twin speak'. Up to 50% of twins will create their own language, which only they can understand, including made-up words and a rudimentary grammar system.
xVNkD TIL It took over 200,000 years of human history for the world's population to reach 1 billion, and only 200 years more to reach 7 billion
xOP5 TIL the movie poster for Django Unchained was designed by a fan and purchased by the studio at Tarantino’s request.
vPKXj TIL Pinball was once banned because people thought it led to more youth crime.
vPEbx TIL The video game Dumb Ways to Die was based off of a Metro Train PSA of the same name