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TIL the Latin word “arena” means “sand” and we get it’s modern definition because Romans covered the colosseum floor with sand to absorb blood

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nWyg7 TIL Spicy “flavor” is not a taste, but rather a reaction to the chemicals in your mouth. This is why some hot sauces can have a bad taste, since taste has nothing to do with spiciness.
l7PwN TIL that Stan Lee, inventor of Marvel Comics, and Theodore Geisel, aka Dr.Seuss, served together in the Army Training Film Division during WW2.
KOmva TIL sharks are called "swimming noses" because 2/3 of their brains are olfactory lobes. They can smell blood in water at 1 part per million from hundreds of meters away. But their sense of taste isn't linked to their nose and is not as developed, so often they bite once then decide not to kill.
EgPGo TIL Andrew Johnson did not master reading, grammar, or math until he met his wife at 17. The only other President with so little formal education was Abraham Lincoln. However Lincoln is esteemed as America's greatest President, while Johnson, his successor, is ranked as one of the worst
eyeL TIL that German children are taught the dangers of misbehavior through traumatic stories. These include a child having his thumbs cut off for thumbsucking and a girl who burns to death for playing with matches