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TIL Mozart's "Jupiter Symphony" was the longest and last symphony that he composed. It is regarded by many as among the greatest symphonies in classical music. Mozart sent tickets to his friend but it is unknown whether it was ever performed in his lifetime or was cancelled for lack of interest

r7Lo TIL: That in 1996 The New York Times crossword correctly used either candidate of the presidential election as the answer to who would be elected the next day!
b9DQZ TIL: Project Corona, one of the earliest reconnaissance satellites, sent film back to earth via recovery vehicles that would be caught in mid air by an Air Force C-119. The recovery vehicles were designed to sink in the ocean after two days should the plane fail to catch it.
epRjE TIL that the Australian government failed to act on HTLV-1, a retrovirus that affects over 40% of the population of some indigenous communities in Central Australia. Between 5% and 10% of those with the virus will develop a rapidly fatal form of leukaemia.
NXXy8 TIL of The Roc, a giant mythological bird from the Middle Eastern folktale Sinbad the Sailor, is thought to be a "distorted account" of the now-extinct, giant flightless Elephant Bird that once lived in Madagascar.
oBmbo TIL about the "Flynn Effect" which shows the average IQ is rising steadily each generation. IQ tests are continually made harder to keep the average at 100. Today's children that take tests from past decades are averaging significantly higher than 100.