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TIL that 50 years ago a white woman (Petula Clark) touched a black man's (Harry Belafonte) arm on American TV and it caused a national commotion

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0wLGp TIL that in Poznan, Poland, eight clams get to decide if people in the city get water or not. They’re equipped with sensors atop them that trip the water supply pumps when they close due to detecting something unsafe in the water.
GAJMG TIL that according to the researches - increasing your physical activity does not have direct linear relation to your calories consumption. Our organism adapts and stops the consumption by other sources, which results in only 5-15% increase in daily calories used despite the ammount of activity.
xPAw TIL On September 1997, the $1 billion American warship USS Yorktown’s propulsion system failed. The Yorktown was incapacitated in the Atlantic Ocean for 2 hours and 45 minutes. The propulsion system failure was caused when the software program made an error by dividing with zero.
7rK57 TIL that when Pope Benedict XI (1302) decided to hire a painter, he sent a messenger to Florence, Italy to collect a sample from Giotto. Giotto drew a perfect circle and handed it to the messenger, instructing him to bring it to the Pope. When the pope learned it was done freehand, he hired Giotto.
e555 TIL: The name for Seattle’s “South Lake Union Trolley - the S.L.U.T.” was changed when officials belatedly realized the acronym.