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TIL studying economics makes you less likely to cooperate with others when playing the Prisoners Dilemma. The more years you have studied economics, the more self-interested you become.

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b6elZ TIL of the Duke of Moctezuma de Tultengo, a hereditary title of Spanish nobility held by a line of descendants of Moctezuma II. Since 1766, the title has been attached to a place of peerage, considered to be the highest honor, held currently by Juan José Marcilla de Teruel-Moctezuma y Valcárcel.
XZ5P TIL that Lina Medina, the world’s youngest mother who gave birth at the age of five in 1939 had started menstruating at three, developed breasts at four and broader hips by five. The biological father was never found and she is still alive today.
lnv5 TIL that a group of scientists used mouse skin cells to create stem cells and then used these stem cells to create mouse eggs. These eggs were then fertilized and produced healthy baby offspring. These latter mice were able to have their own babies.
ADXn TIL the Cleveland Indians held an unlimited 10 cent beer night in 1974, which resulted nudity, fireworks shot at the opposing team’s dugout, and a large fan riot complete with knives, chains, and portions of the stadium’s seats.
0K1R TIL each person has a “walking signature” that can be detected by their smartphone’s accelerometer data; the signature persists even if you change phones