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TIL that today, from 6:02 am to 6:02 pm on October 23, is unofficially recognized as Mole Day by chemists (in honour of 6.02x10^23 atoms present in one mole of a substance).

Read more chemistry.about.com

via reddit.com

Lkd00 TIL that the French philosophy on emergency medical care is to provide a higher level of care at the scene of the incident, and so every ambulance is staffed with a Doctor who arrives on site.
KOQjR TIL for Disney's Snow White, animators had difficulties adding the color red to Snow White's cheeks: "she looked like a clown with painted cheeks". That is until one of the ink-and-paint girls suggested they use real blush on the animation cells. Thus, every scene with Snow White has real makeup.
GBM5 TIL:Ernest Hemingway survived,anthrax,pneumonia, dysentery,diabetes,high blood pressure,two successive plane crashes that resulted in ruptured kidney and liver, broken skull, second degree burns, and numerous other accidents, then won the Nobel Prize in Literature and eventually committed suicide.
WDKY TIL One of the most important Medieval innovations was the horse collar, which allowed horses to use their full strength to pull loads or to plow and which only came to Europe around 920 AD.
KYOn9 TIL after he was fired from his job as embassador, tortured and banished to his farm estate, N.Machiavelli would return home at night, change the dirty clothes he wore for field work and put on his ambassador outfit, just to study in his office, alone, due to how much he missed his job