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TIL some people truly are "born miserable." According to researchers, some people are genetically programmed to be more negative than others due to the levels of a molecule, neuropeptide Y, being lower in their brains than others.

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vPewB TIL spiders lack leg muscles and instead extend their legs through a hydraulic system powered by their blood pressure. Upon death, the legs curl up due to the loss of blood pressure.
woJXE TIL that professional ice hockey player Duncan MacPherson disappeared in 1989 at the age of 23, and he was found dead 15 years later on a mountain in Austria.
YALP TIL adjectives in English always have to be in this order: opinion-size-age-shape-colour-origin-material-purpose Noun. So you can have a ‘lovely little old rectangular green French silver whittling knife’, but any other word order would sound entirely wrong.
VD8D TIL if the federal government replaced the $1 bill with the $1 coin (and the US population accept the non paper currency), it would save the government approximately $184 million a year, or $5.5 billion over 30 years
9mXp TIL: When Albert Einstein published his Theory of General Relativity, the New York Times sent their golfing correspondent to interview him.