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TIL that London is plagued by wild parakeets, theorized to have descended from a pair released by Jimi Hendrix in the ‘60s

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JYQAB TIL that 27 states have land north of the southernmost point in Canada
EbQ7 TIL that when doctors did not belive Drs. Barry Marshall and Robin Warren’s discovery in 1982, which showed that Helicobacter pilory causes stomach ulcers, Marshall himself drank a beaker of H. pylori culture. He bacame ill of stomach ulcers and they won the nobel prize in physiology in 2005.
5VaNk TIL that amethyst is just purple quartz, and the main reason that quartz turns purple is because it's been irradiated
AkPa TIL That Supreme Court Justice Oliver Wendell Holmes had, in his long lifetime, shaken hands with John Quincy Adams (b. 1767) and John F. Kennedy (d. 1963)
KYdD9 TIL that when it's really cold, Chicago sets its railroad tracks on fire to ensure that trains will be able to run properly and get to their destinations on time