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TIL: The original Doctor Who theme music was composed without musicians, instruments, synthesizers or even a two-track recorder. It was put together on one-inch pieces of 1/4inch tape and painstakingly stuck together by British digital music pioneer Delia Derbyshire and her assistant.

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9Yr1m TIL about neutral Moresnet, an formerly independent village-nation between Germany and Belgium that continued to exist until 1920. At it's height, it housed 3500 citizens and the largest zinc-mine of Europe. The flag colors came from a mining company and it's citizens were considered stateless
Lkn89 TIL that a herd of wandering wild elephants have become celebrities in China as they make a 15 month, 500 km odyssey from their forest reserve. Rather than capture them, the Chinese support their migration via drone monitoring and corn and pineapple food deliveries
b9yw7 TIL that butterflies and bees need salt to survive, so they sometimes drink the tears of crocodilians such as caimans and other animals in regions where the mineral is scarce.
Y79ZG TIL Mongols didn't end the Islamic Golden Age in Mesopotamia. It was already end in 11th century
kO6Y5 TIL the Valyrian languages spoken in the TV show, Game of Thrones, was developed by linguist David J. Peterson based on the few words author George R. R. Martin put in the novels. The fully developed language now provides additional Valyrian translations to Martin for use in his forthcoming novels.