› added 1 year ago

50

TIL that the person who has most often performed the National Anthem at the Super Bowl is actress Marlee Matlin, who has provided ASL Sign Language translations three times.

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9Ydkm TIL that a paper centrifuge has been designed by Manu Prakash in 2016 based on spinning toy, whirligig. It can reach 20,000 rotations per minute and can be used to separate plasma from blood and malarial parasites, operate with hands without electricity and costs 20 cents.
wol16 TIL the USS Scorpion was lost at sea in May 1968 with 99 men lost. The wreckage was found almost two miles deep, making it impossible to determine the cause of accident. Underwater acoustics out of the Canary Islands heard the exact time of the implosion but were unaware it was the sub sinking.
R7yP6 TIL Han Zhijun has been described as "China's most mysterious first lady". Han never accompanied Chairman Hua on business trips abroad and the two rarely appeared in public together. Reportedly, Han continued to cycle to and from work
e07N4 TIL that 50 years ago a white woman (Petula Clark) touched a black man's (Harry Belafonte) arm on American TV and it caused a national commotion
5VVx9 TIL that the spellings "per cent" and "percent" are both correct, the difference is that "per cent" is used mainly in Britain and Canada, whereas "percent" is most preferred in the US