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TIL Mexico City is 7200 feet above sea level which had a major affect on athletes in the 1968 Olympic games

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E1W0x TIL that dog obesity is positively correlated with owner obesity. This effect is only seen in dogs and not cats. The study suggests that this correlation can be attributed to obese owners walking their dogs less. No explanation other than neutering is given for the variation in weight among cats.
LkxMP TIL that heroin was used as a painkiller for kids
MegyW TIL astronauts returning from space report higher concern with Universalism, Spirituality and references to "values orientated toward the collective good".
J1YN8 TIL Mankind constantly analyzes radio waves from outer space in the search for extraterrestrial intelligence. Since this analysis started, almost all of the signal sources have been identified. 37 signals, however, remain unexplained. Hence the name of the Co that created Basecamp.
ADRJg TIL that all GPS coordinates in China are intentionally obfuscated and shifted by 50-500m by a "confidentiality algorithm"