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TIL: Orcas live in matrilineal families

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8oML TIL pencils are painted yellow because in the 1890s, China had the best graphite in the world, and China associates the color yellow with royalty and respect.
M7ky7 TIL that it’s a felony to have a one night stand in Michigan
j61Ep TIL the population of the North Sentinelese living on North Sentinel Island is estimated to only be between 50 and 100 people.
e0be4 TIL that in Abraham Lincoln's time in the Illinois legislature, he once leapt out of a first-story window in a failed attempt to prevent a quorum from being present. The doors of the Capitol had been locked to prevent legislators from fleeing.
rXDe TIL that color-blindness in humans happens when a person has two visual processing cones instead of the usual three. There is a flipside, that there are people who have a condition known as Tetrachromacy, where someone has four cones, potentially allowing them to see more of the visible spectrum.