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TIL the use of the letter “Z” to indicate snoring or sleep was first documented in an August 2, 1903 comic strip called Katzenjammer Kids

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9Knm TIL the “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven
x6j5k TIL Neil Armstrong became a professor after he walked on the moon, teaching aerospace engineering at the University of Cincinnati.
MeZR0 TIL The Moon-Phases are not caused by the shadow of the earth
Z85oY TIL that people dress up in full suits of armor and go at each other
7r5JZ TIL Teddy Roosevelt is the only president that had a tattoo