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TIL PhotoDNA, Microsoft software, can automatically identify an image as child porn. Over 70 companies are using it to detect these illegal images and aid law enforcement around the world.

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R7je7 TIL In 1984, an anti-cruise missile activist poured red paint on the only good copy of the Canadian Constitution. He was subsequently sentenced to 89 days in weekend jail.
d8kLr TIL that there are orchids whose flowers look like female bees. When males try to mate with them, they transfer pollen. The Ophrys Apifera species mimics a bee species that went extinct long ago. So, the only memory of the bee is a painting by a dying flower.
Xy5E TIL That before the 1500s, there were no potatoes, corn, tomatoes, and tobacco in Europe nor oranges, bananas, mangoes, and coffee in America
4krMw TIL a town in India is addicted to chess after one man taught everyone how to play 50 years ago to eliminate excessive alcohol consumption and gambling, which has now all decreased to nearly nothing.
ep4GJ TIL: Leona Helmsley, was dubbed "The Queen of Mean". She came from an immigrant family and in her late 40s became a real estate mogul going from new millionaire to billionaire in the next 2 decades. She was known for being abusive and left $5 billion to dog charities and more to her dogs than kids.