| July 31st 1841 | - Birth: | George Melville, polar explorer, naval engineer |
| July 31st 1980 | - Death: | Bobby Van, actor/TV host (Make Me Laugh), dies of cancer at 49 |
| July 31st 1969 | - Event: | Mariner 6 flies past Mars |
| July 31st 1291 | - Event: | Egyptian Mamelukken occupies Akko, crusaders driven out of Palestine |
| July 31st 1990 | - Event: | Nolan Ryan becomes 20th major league pitcher to win 300 games |
| July 31st 1966 | - Birth: | Marina V A Mowatt, [Ogilvy], daughter of English princess Alexandra |
| July 31st 1913 | - Birth: | Bryan Hextall, NHL hall of famer (NY Rangers) |
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