Incredible underwater images

Mary Killman and Mariya Koroleva of the United States compete in the Women's Duets Synchronised Swimming Technical Routine on Day 9 of the London 2012 Olympic Games at the Aquatics Centre on August 5, 2012 in London, England. (Photo by Clive Rose/Getty Images)

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Feeling a little hot with this summer heat? Cool off with this unique perspective of various water sports.

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