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TIL T.E. Lawrence's (Lawrence of Arabia) death in a motorcycle accident made one of his doctors study what he saw as the unnecessary loss of life by motorcycle despatch riders through head injuries which led to the increased use of crash helmets by both military and civilian motorcyclists

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9YNaM TIL that sometime in 1981, President Ronald Reagan ordered an SR-71 to spy on a secret North Korean conference, not because there was anything to learn, but because the repeated sonic booms would interrupt the conference and there wasn’t a weapon on earth which could shoot the craft down.
XE9wP TIL that caffeine, THC, nicotine, capsaicin (hot peppers,) theobromine (tea,) are natural insecticides. Yet humans find them delicious.
ZpalY TIL Crystal Cave in Mexico is so humid and warm that fluid will begin to condense in a person's lungs, and cause them to 'drown' if they linger too long inside.
Ao6o TIL The Chinese government “encouraged” the country’s tallest female basketball player to marry the country’s tallest man. Their child was Yao Ming.
7rOWX TIL Only about 7,100 cheetahs are left in the wild on Earth. The current number is down from an estimated 100,000 at the end of the 19th century.