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TIL: An estimated 8 million war horses were killed in conflict during WW I. They were used to help carry food, water, ammunition & medical supplies. More than a million dogs were also killed. They were used as messengers, sentries, rescuers, and small beasts of burden

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GYoX4 TIL U.S Route 666, nicknamed "The Devil's Highway" was renamed to Route 491 in 2003, and within days of the announcement all the old signs containing the number 666 were stolen as souvenirs.
d8y79 TIL: Long periods of isolation without sunlight creates 'time-shifting' effects on the mind to the point of sleep-wake cycles being doubled.
obOo TIL In 1970 America had over 50,000 pay toilets. By 1980, there were almost none.
VPoQ TIL It was Persian custom to debate “affairs of weight” while drunk and sober. The same conclusion had to be reached when drunk and sober to be acted upon.
Wk1MY TIL the United States has had a Vice President who was Native American. Charles Curtis served as VP under Herbert Hoover from 1929-33. His mother was of mixed Native heritage, and he grew up with his maternal grandparents on the Kaw Reservation in Kansas.