On this day: July 17

POSTED: 12:56 PM Jul 16 2012   UPDATED: 12:00 AM Jul 17 2013

Air conditioning is born, the "happiest place on Earth" opens up, and the Beatles get animated, all on this day.

OTD July 17 - Dizzy Dean
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Public domain

1974: Hall of Fame baseball pitcher Jay "Dizzy" Dean, the last National League pitcher to win 30 games in one season, dies of a heart attack at age 64 in Reno, Nev. A four-time All-Star who won a World Series title in 1934 with the St. Louis Cardinals, Dean also played for the Chicago Cubs during his 11-year career and also made a one-game comeback in 1947 for the publicity-starved St. Louis Browns.

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