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TIL part of the static seen on analog televisions is cosmic background radiation from the big bang.

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eVXL TIL a Congressional investigation into the NSA conducted nearly 40 years ago revealed that the NSA has been routinely monitoring telephone conversations of American citizens since the early 1950’s.
1jDP TIL In 1997 Morgan Freeman offered to cover the cost of prom for a Mississippi school that held two racially segregated proms every year, provided that the one Freeman would be covering would just be one racially integrated prom. This offer was refused until 2008.
rnEM TIL in 1994 a woman killed her husband but was found not guilty because of PMS.
KOpeQ TIL: The Mongol Empire once extended over an estimated 9.27 million square miles (24,000,000 km2), which is about 17.8% of Earth's total land area, almost 5x larger than 'Pax Romana' Rome.
wLapP TIL that tanning in a UV bed a single time increases a person’s risk of developing melanoma by 20 percent.