› added 12 years ago

177

TIL there are helmets which remain completely invisible until the moment of impact.

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DQO8v TIL a study found an inverse association between plain water consumption and depression: drinking less than two glasses daily increases depression risk significantly, while higher intake lowers it. Another study found children who drink around 10.5 cups per day show greater mental flexibility.
npQb TIL that the act of “giving the key to the city” is a continuation of a medieval practice where the cities would be locked at night but someone given the key could come and go as they please as an honor for something great done for the city
PY48V TIL four American presidents were neither Democrat or Republican but "Whig", a third political party that collapsed around 1855.
LJap TIL that white-tailed eagles often reuse their nests instead of recreating them year after year. One family of white-tailed eagles in Iceland have taken this to the extreme by reusing the same nest for 150 years.
PwQJ TIL of John Clem, a Union drummer boy during the American Civil War who shot a Confederate colonel who demanded his surrender. He was later promoted to sergeant becoming the youngest NCO in the history of the US Army.