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TIL a study from 2015 showed evidence that polar bears are submissive to grizzly bears even when the latter is smaller, fewer, and/or not acting aggressively. Polar bears acted submissively towards grizzlies in 132/137 interspecific interactions at whale carcasses.

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p8xJZ TIL that if you win the American reality show 'Survivor' you have to give up any non-U.S. citizenship to be able to claim the prize money
6n18 TIL Total US credit card debt is going to surpass $1 Trillion by Christmas.
9wvn7 TIL that the real fiddle that belonged to Charles "Pa" Ingalls, made famous from the "Little House on the Prairie" books and series, was bequeathed to Laura Ingalls Wilder and is now on display at a museum devoted to her and her books. It is still maintained and played at museum events.
16xrW TIL during the Islamic golden age the Abbasid Caliphate passed laws mandating hospitals stay open 24 hours a day, forbid hospitals from turning away patients unable to pay and formed charitable foundations called waqfs to support public institutions like hospitals and schools
wPK1 TIL that the ‘great prosperity’ period lasted from 1947-1977. We now live in the 'Great Regression’ period