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TIL that Marilyn vos Savant received nearly 1,000 letters of complaint with signatures bearing PhDs after (correctly) stating that choosing to switch doors in the Monty Hall Problem would double the chances of winning.

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d8jn8 TIL, Sea World San Diego managed to keep Blue Sharks, a beautiful pelagic species, in captivity. Until they added bull sharks, which ate the blues. No one has managed to copy the feat since.
0wPyj TIL a small war was fought between the 3 original settlements that would become Milwaukee. Even today the bridges downtown are crooked because each settlement refused to acknowledge the street layout of the settlements on the other side of the river.
0dXVy TIL There are consumers who are known as Harbingers of Failure. They have a knack for buying products that turn out to be market flops. "when the harbingers buy a product at least three times, it’s really bad news: The probability of success for that product drops 56 percent."
1ayb7 TIL Gene Greytak was a real estate broker who moonlighted as an actor, but he only played and made personal appearances as Pope John Paul II. If you saw the Pope in a movie or on a sitcom before 2005, it was Gene.
6EYAW TIL Fireflies are the most efficient lights in the world. 100% of energy is emitted as light. Fireflies: larvae & eggs glow, talk to each other with light, imitate each other, then eat other fireflies, are on almost every continent, taste bad, are medically and scientifically useful, adults live<1mo