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It's the difference between a grainy black-and-white film and HD.

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pMgO TIL In the 1820s, the biggest department of the US Government, even outnumbering war personnel, was the Post Office.
7k9x TIL that nearly 1 percent of young women in a U.S. study who have become pregnant claim to have done so as virgins, according to a report in the Christmas edition of Britain’s BMJ medical journal
OGZ1a TIL the idiom “the best laid plans of mice and men often go astray” originates from a Scottish poem in 1786: “The best laid schemes o’ mice an’ men / Gang aft a-gley, / An’ lea’e us nought but grief an’ pain, / For promised joy”
WeGL TIL Astronomers have found a planet that rains glass sideways
JR6v TIL that America’s Most Wanted once caught a fugitive when the employees at a café gathered to watch a segment about a murdered colleague, then realised that the child molester from another segment of the same episode was in the kitchen as the replacement for the murdered man.