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TIL: The opening of the male urethra, the meatus, is a vertical slit in order to force urine to exit in a spiral after having traveled the length of the penis in a vertically compressed tube. This design allows for greater control of the stream and also keeps the end of the urethra clean.

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aed0 TIL that in medieval times it was common to have “2” sleeps per night. You would fall asleep for 4 to 5 hours, wake up for 2 hours or so and fall back to sleep for another 3 to 4. It’s been suggested that we may have evolved this way to tend to the fire in order to keep us warm and safe.
wLndJ TIL, Elvis Presley wanted to record "I Will Always Love You". Dolly Parton was interested until Presley's manager told her that she needed to sign over half of the publishing rights to the song. She refused. This decision helped her make millions of dollars in royalties from the song.
d8Pjr TIL That the October Russian revolution actually occurred in November as the Russians did not change to the Julian calendar until the Soviet era
ZpGwo TIL the release of the trailer for Grand Theft Auto IV caused such a demand on Rockstar's servers that they crashed, causing fans to seek alternate links to the trailer. One user, as a prank, linked the wrong video on a forum. This is the origin of the Rickroll.
epRO5 TIL about Gemistos Plethon, a 14th/15th century Greek scholar who rejected Christianity and favoured a return of Hellenic paganism in the Byzantine Empire.