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DNA: Today In History, July 21, 2017

DNA : Today In History, July 21, 2017 DNA : Today In History - This segment of DNA offers you historical information about the events which have taken place on this date. In 2007, JK Rowling's novel 'Harry Potter and the Deathly Hallows' was released, world's lowest recorded temperature up to now was recorded in Antarctica in 1983 and other interesting information are featured in the segment.