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TIL the burning sensation felt when applying rubbing alcohol to cuts is caused by nerve cells in the cut that are trying to protect you by responding to heat. The alcohol lowers the amount of heat needed to turn on these cells so much that your own body temperature causes the burning.

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MEQ7 TIL Anderson Cooper was in the CIA
J1R8k TIL that the United Church of Canada has had an openly non-thiest priest on thier books since 2001; and an openly Atheist one since 2013
Y7jnr TIL The Wire Fox Terrier has won the most Best in Show awards at the Westminster Kennel Club Dog Show, with 15 wins. The Scottish Terrier and English Springer Spaniel come in 2nd and 3rd place respectively
yVYpM TIL that Henryk Siwiak was killed on a street of Brooklyn shortly before midnight. He is the only victim on the list of murders in New York on September 11, 2001, since the city does not include the deaths from the 9/11 attacks in its official crime statistics. His murder has never been solved.
mxOmE TIL of Arthur Chu, a Jeopardy! contestant who won 11 games by picking a new category after every correct answer to throw off his opponents