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TIL actress Tippi Hedren is directly responsible for over half of the manicurists in the country (and 80 percent in Southern California) being Vietnamese.

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0dOkL TIL that The Jetsons originally ran for only one season of 24 episodes in 1963-64 before getting canceled due to low ratings. It gained popularity in syndicated reruns, leading to 51 more episodes being produced in the mid-80s.
0wnV5 TIL: there is minimal, short-term, and generally unreliable evidence that flossing might reduce gum inflammation, but no convincing evidence that it promotes plaque removal or prevents tooth decay or dental cavities
g9xy TIL that Canada has no national rule on sewage treatment, and dumps a staggering amount of human excrement, toxins and pharmaceuticals directly into rivers and the ocean
OodQ7 TIL of Encephalartos woodii, a near-extinct tree with only a single surviving male specimen. Without any female specimens the only way to reproduce it is to clone the male.
dDvnd TIL: The Roman punishment of Relegatio is the mildest form of exile. You are banished from Rome, but get to keep your citizenship, property, land, etc. One senator chose the famous island of Lesbos. It is a light punishment meant for adulterers, pimps, abusers, and manslaughter.