On this day: August 20

POSTED: 1:46 AM Aug 19 2012   UPDATED: 12:00 AM Aug 20 2013

Charles Darwin publishes his theory of evolution, the NFL is founded, Lou Gehrig belts his 23rd career grand slam and NASA heads for Mars, all on this day.

OTD August 20 - Isaac Hayes
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National Archives and Records Administration

1942: Singer-songwriter and actor Isaac Hayes ("Theme from Shaft," "South Park") is born in Covington, Tenn. Hayes is seen here performing at the International Amphitheater in Chicago at the 1973 PUSH (People United to Save Humanity) Black Expo.

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