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TIL removing earwax with Q-tips makes our ears dirtier, and can cause itchiness and infections

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Y1mW TIL - One teaspoon of water contains about three times as many atoms as the Atlantic Ocean contains teaspoons of water
ma9M TIL of an experiment in a hospital where the sign at a hand-washing station was changed from “Hand hygiene prevents you from catching diseases” to “Hand hygiene prevents patients from catching diseases” resulting in a 45% increase in the use of soap or hand sanitizer.
b9dJE TIL of the world's richest woman, Françoise Bettencourt Meyers. She owns a 33% stake in L'Oreal which was founded by her grandfather, Eugène Schueller, a known fascist and Nazi sympathizer. Françoise married and has raised her children Jewish.
G4lE TIL that Titan, the largest moon of Saturn, harbors an extremely salty ocean
4Xkla TIL that the Holy Roman state of Hesse-Kessel became a "mercenary state" renting out its army to other major powers. The state maintained strict neutrality, to the point that it would rent out soldiers to both sides of a conflict and the Hessian soldiers would end up fighting each other.