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TIL that the NOFX album ‘White Trash, Two Heebs and a Bean’ originally had title that was deemed offensive by Eric Melvin’s mother, who threatened to tell his grandfather. The title was therefore changed.

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vPjVr TIL metal tube invented in 1732 is what measures the speed of supersonic jets (and any other airplane, boat, or even F1 car). Called a pitot tube, it measures airspeed by measuring air pressure. More information at the link.
dDM97 TIL that during the Battle of the North Cape the cruiser HMS Belfast pursued the battleship Scharnhorst away from the first engagement, risking Scharnhost's guns in order to keep a radar track to guide a second British fleet into position to sink her
rNNnM TIL about Thiomargarita magnifica, a bacteria that can grow up to 2 cm
ABOw TIL After the Vietnam war Vietnamese farmers recycled thousands of external fuel tanks from U.S. aircraft to create river boats and canoes
n759 TIL that each year on April Fools Day, James Randi gives an award to expose frauds called the Pigasus Award.