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TIL that human body temperature has declined in the past century.

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via reddit.com

l7jv1 TIL Benjamin Franklin invented an instrument called the Glass Armonica. A musician powered a foot pedal to rotate 36 concentric glass bowls and produced notes by putting wet fingers to the spinning glass.
8ab18 TIL that many scientists believe that there is a 'mean gene' that is passed down through families and that there are four categories of meanness. Some scientists believe that this will eventully go away via evolution.
w5ZJ TIL Mark Twain told an interviewer that he was not actually Mark Twain, but Mark Twain’s twin brother, but since his parents couldn’t tell which one drowned in the bath tub when they were babies, the parents decided that the one who lived must have been Mark.
LZdv TIL that in The Simpsons episode “You Only Move Twice”, Albert Brooks ad-libbed most of Hank Scorpio’s dialogue. The end result was two hours of dialogue for Hank.
NN7P TIL that Tsar Peter the Great of Russia learned shipbuilding at a dock in Amsterdam after disguising himself as a common craftsman and worked on constructing the ships himself.