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TIL that the "pink for girls, blue for boys" color scheme didn't become common until the mid 20th century. Earlier in the 1900s it was actually "pink for boys, blue for girls".

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jN57X TIL Scientists in China have successfully grown tooth enamel which paves the way to replace fillings & crowns. A chemical mixture applied to whole human teeth created an enamel layer 2.7 micrometers thick within 48 hours. (Calcium & phosphate ions with triethylamine in alcohol).
NJ7P TIL that for 30 mins they turned off the lights in Iceland city enabling people to see night sky whilst a radio programme told them what to look out for
ANAyg TIL Elton John has frequently said that without songwriter Bernie Taupin there would be no Elton John. The have been collaborating on music for 56 years, since Elton was 20 and Bernie was 17. A few songs of Taupin’s: Crocodile Rock, Candle in the Wind and Rocket Man.
W7VPo TIL some of the last German Soldiers to fight the Red Army during the Battle of Berlin were in fact foreign volunteers of the Waffen SS. Frenchmen of the 33rd Charlemagne Division and Scandinavians of the 11th Nordland Division joined together as some of the last defenders of the Third Reich.
VB5Dk TIL that King of France Louis XIV decreed that French Army cannons be inscribed with the Latin phrase "Ultima Ratio Regum" meaning "The Last Argument of Kings" - as Louis XIV considered war to be an extreme continuation of politics and thus the last argument in a difficult debate.