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TIL Japanese scientists created a virtually painless needle by studying mosquitoes

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9RnG TIL the world’s smallest, fully functioning gun can fit in the palm of your hand.
xgg0 TIL The 13 steps of the pyramid on the back of the dollar bill represent the original 13 colonies. The fact that it’s unfinished symbolizes room for future growth
94xB TIL the word ‘Homeboy’ goes back to the 1800’s, and was used by African Americans to refer to each other as people from 'back home’.
0L5L TIL a woman changed clothes while on a tour of Iceland and people thought she went missing because they didn’t recognize her. The woman joined a search party looking for herself.
VB7VZ TIL In 2010, Greg Fleniken was found dead inside his locked Texas hotel room. He had no obvious external injuries but massive internal damage. His death was ruled a homicide. After an 8-month investigation, it was found that a drunk guest in the next room accidentally shot Fleniken in the scrotum.