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TIL that the nuclear warning systems for both US and Russia aim to detect a nuclear weapons before they hit the target so that a retaliation can be launched before their own weapons are destroyed. The system has given at least 22 false alarms which could have caused a nuclear war.

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p8pXN TIL that Cher was the first woman to regularly display her belly button on television, becoming the first woman to do so in front of a live studio audience in 1971
W7dZ4 TIL Howard Hughes was a chronic insomniac who wanted to watch movies on TV when most people were asleep, but when he first arrived in Las Vegas he discovered that it had no all-night TV stations. So he purchased a local station in 1967 and turned it into a 24/7 channel.
QJ0l9 TIL the reason cats and snakes have vertical pupils is because it increases their depth perception while hunting at night while prey animals such as sheep have horizontal pupils so that they may have a panoramic view of their surroundings to watch for predators.
b6pON TIL The taxidermied body of the original Cocaine Bear is allowed to officiate weddings in Kentucky.
0wYE5 TIL the song 'That's All Right', Elvis Presley's 1954 break out song, was a song written and originally recorded in 1947 by Arthur Crudup, a Mississippi Delta blues musician, who based the song largely around a verse in a Blind Lemon Jefferson song from 21 years earlier, called 'Black Snake Moan'