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Til: Dogs turn in circles before lying down because in the wild this turns long grass into a bed

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DQ16r TIL computer scientist Jean-Marc Salotti calculated that in order to survive, a human colony on Mars would need at least 110 indidivuals. At this number, growth would offset many of the factors that could lead to collapse of the society.
E1Yx0 TIL Queen Victoria's private doctor prescribed marijuana to relieve her menstrual cramps, describing it as "one if the most valuable medicines we possess" in 1890.
awmEb TIL chemically speaking, there's not a huge difference between inhaled and exhaled air.
rNDkx TIL The man who invented the Labradoodle says most are ‘crazy or have a hereditary problem’.
a5L0 TIL: “Avocado Hand” is a recognised term amongst hospital staff. It regards a self-inflicted injury whilst attempting to slice an avocado.