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TIL WD-40's formula is a trade secret, and has not changed. To avoid disclosing its composition, the product was not patented in 1953, and the window of opportunity for patenting it has long since closed.

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awoeb TIL In 2019, Roderick Sewell became the first-ever above-the-knee double-amputee to complete the grueling Ironman World Championship on prosthetic legs. The race included him completing a 112 mile bike ride he completed by pedaling a recumbent bike with his arms.
KYAPJ TIL that Edith Piaf was named after Edith Cavell, a British nurse in WW1 Belgium, who saved the lives of soldiers on both sides and helped 200 Allied men escape German-occupied Belgium before being shot by the Germans for treason, and who is now included in the Church of England Calendar of Saints.
rn90 TIL of a Buddhist monk who was famous for “enlightening” women with sex, referring to his penis as the “Thunderbolt of Flaming Wisdom”.
kg5g TIL During WW2 in Africa, US tanks were outmatched by superior German tanks. So the US used Jeeps with machine guns to go behind enemy lines to destroy the fuel trucks supplying gas to the German tanks thereby disabling them.
e08kL TIL Not only do bats make high-pitched sounds for echolocation, many bat species also sing. A team of scientists that analyzed one species’ song translated it as a sequence that opens with a hello, then a gender identification, then some geographic information, & then a "let's talk" section.