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TIL that in 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.

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VModG TIL The Beatles' "Yesterday" is the most covered song in history (covered more than 2,200 times) Liberace, Frank Sinatra, Elvis Presley, and Boyz II Men have all put their own spin on the song.
nejWY TIL: Malaysia proposed that the UN Security Council set up an international tribunal to prosecute those deemed responsible for the downing of a Malaysia Airlines Flight. 298 People died over Ukraine when hit by a Russian Anti-Aircraft Rocket in 2014, the resolution was vetoed by Russia.
Br94D TIL: Sylvester Stallone wanted to use "Another One Bites the Dust" by Queen as the theme song for Rocky III, but was denied permission. So, "Eye of the Tiger" by Survivor was written.
loo47 TIL Studies show atheists are more intelligent than religious people
R70jj TIL that Josef Stalin was highly suspicious of doctors and had many Kremlin doctors arrested and tortured. So few doctors were available that after Stalin suffered a stroke, one imprisoned doctor claimed he was mid-interrogation when his captors suddenly started asking for medical advice instead.