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TIL For thousands of years, syilx people and other Canadian First Nations have been visiting a sacred medicine lake with 365 naturally formed “spots”. A non-Indigenous man once wanted to convert it into a spa but First Nations took back possession of the lake and permission is required to visit

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0QkN TIL the False Positive Paradox describes a situation where a “highly accurate” test is worthless if the testing condition is rare enough. Example: If 10 people in a city of 20 million are “bad guys” and a surveillance program identifies them with 99% accuracy, then 99.995% of positives will be false
7EmO TIL that Daryl Davis, a black musician, is credited with dismantling the entire KKK network in Maryland. He did this by befriending many members, even going so far as to serve as a pallbearer at a Klansman’s funeral.
pYpO TIL that in 1990 an unemployed French physicist attempted a one-man invasion of an island and was arrested while reloading his gun on a bench by the island’s volunteer constable.
dnOj TIL a 10 year old British girl saved nearly a hundred foreign tourists at Maikhao Beach in Thailand by warning beachgoers minutes before the arrival of the 2004 Indian Ocean earthquake tsunami. She learned about tsunamis in school just two weeks prior to the event.
xVe1 TIL In 1984 Terry Williams was sentenced to death for murdering two men. After his sentencing, when jurors learned these men had repeatedly raped Williams for years, several came forward to say they no longer supported his death sentence. He is scheduled to be executed on October 3rd, 2012.