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TIL that the Uncompahgre Ute Native American tribe made special ceremonial rattles filled with quartz that would emit flashes of light when shaken. This was an early example of triboluminescence.

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e0bLL TIL about convicted murderer Norio Nagayama who went on to become an award-winning novelist while in prison. He was executed in 1997.
W7Vjd TIL that Lake Superior has an island which has a lake which has an island which has a pond which has a boulder, which, when the pond floods, becomes the largest island in the largest lake on the largest island in the largest lake on the largest island in the largest lake in the world.
4kyMg TIL a 1896 study found that 90% of all commercial ketchups contained “injurious ingredients” that could lead to death. So "at a time when no one else cared" Henry Heinz was obsessed with making products as pure as possible. His see-through bottles were a design statement: purity through transparency
0omy TIL Despite basing ‘O Brother, Where art Thou?’ on The Odyssey, neither of the Coen Brothers had ever read the Epic and were only familiar with the plot through adaptations and pop culture references.
AN0xw TIL about the sultanate of women. A period in ottoman history that lasted for a century where the wives and mothers of the sultans held incredible political power that was started by hurrem sultan, the wife of suleiman the magnificent.