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Fri Jul 20, 2012 9:59am EDT (This is the sixth in a series of stories about the science behind the Olympics to run daily this week. The full list will be updated at ) NEW YORK, July 20 (Reuters) - For an event featured 2,719 years ago in the first pentathlon, the discus throw is long overdue for an analysis more sophisticated than "chuck it as hard as you can". Thanks to several new three-dimensional studies in biomechanics labs, the ancient event is finally getting its due. Based on the latest fin...