On this day: February 18

Published: Feb 17 2013 05:45:58 AM EST   Updated On: Feb 18 2015 02:00:00 AM EST

Jefferson Davis becomes the president of the Confederacy, Pluto is discovered, a cow flies, the first Church of Scientology is formed, the Chicago Seven are found not guilty, and Dale Earnhardt dies at the Daytona 500, all on this day.

OTD February 18 - Serena Williams
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Julian Finney/Getty Images

2013: Tennis player Serena Williams becomes the Women's Tennis Association's world No. 1 for the sixth time in her career. By regaining the ranking at the age of 31, she became the oldest No. 1 player in WTA history. She retained the No. 1 ranking throughout 2013 and 2014 and into 2015, raising the record to age 33.

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    Julie Denesha/Getty Images

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    A former U.S. vice president is indicted for treason, the most powerful earthquake ever recorded hits Chile, "Pac-Man" makes his debut, Johnny Carson signs off, and a deadly tornado devastates Joplin, Mo., all on this day.