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TIL scientists created a sort of telepathy using computers

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via reddit.com

nWgrb TIL: That 749 Americans died in a secret D-Day training disaster in 1944 when German boats attacked their convoy. More died in this rehearsal than on actual Utah Beach, and D-Day was nearly cancelled because missing officers knew invasion plans.
9Rbr TIL that Oklahoma’s state vegetable is a watermelon
LkWDd TIL in World War II, a few engineers wanted to reinforce the (returned) fighter planes where most of the bullet holes were. Mr. Abraham Wald then said: Let's reinforce them where no bullet holes are instead - because apparently, airplanes hit in these spots did NOT return.
b6lx0 TIL that the Great Vowel Shift between 1400-1700 was a series of pronunciation changes in English. With that many words froze with spelling and pronunciations not matching. This is why some English vowels are a mess with words like "meat" and "meet" being spelt differently but pronounced the same.
ZpxXa TIL Before toilet paper, people used corn husks, sea sponges, and even a scraping technique with seashells after using the bathroom.