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TIL the smell from cut grass comes from cis-3-hexenal which is also an insect pheromone

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dQQj TIL it is common for people to have a recurring nightmare in which it is the day of a final exam and you realize that you forgot you were taking the course and therefore had not attended any of the classes, or variations on this theme.
4kBXb TIL that in 2009 the US launched a satellite so secret that no government agency admits to owning it. Even the name, "Palladium at Night", is mysterious.
JY9k1 TIL Sherpa people have a small number of names and children are often called by days of the week. They also give names according to certain virtues. By mistake of the enumerators in Nepal, their nationality was added as a surname. Otherwise, they have no last name.
gM5Ay TIL Julius Caesar was "slut shamed" for an alleged sexual relationship with King Nicomedes Bithynia. Not because it was of a homosexual nature, but because Caesar was allegedly the receptive partner. The accusation may have been a political smear, but it bothered Caesar for the rest of his life.
DDkV TIL there were 6 assassins sent to kill Archduke Franz Ferdinand and 1 of them threw a bomb that exploded under the wrong car. His assassination failed, he took a cyanide pill and jumped into the river. The pill only induced vomiting and the river was only 13cm deep. He failed at killing himself too