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** FOR USE AS DESIRED, YEAR END PHOTOS ** FILE -In this Jan. 14, 2010 file photo, Sultan Kosen of Turkey, 27, right, and He Pingping of China, 21, seen, during an event organized by the Guinness World Records in Istanbul, Turkey. When the image was taken, the towering Turk, Kosen, is the tallest man walking the planet with a height of 246.5 cm ( 8 feet 1 inch) and He is officially the world's shortest man with a height of 73 cm (2 feet 5 inch). (AP Photo/Ibrahim Usta, File)

** FOR USE AS DESIRED, YEAR END PHOTOS ** FILE -In this Jan. 14, 2010 file photo, Sultan Kosen of Turkey, 27, right, and He Pingping of China, 21, seen, during an event organized by the Guinness World Records in Istanbul, Turkey. When the image was taken, the towering Turk, Kosen, is the tallest man walking the planet with a height of 246.5 cm ( 8 feet 1 inch) and He is officially the world's shortest man with a height of 73 cm (2 feet 5 inch).

World's tallest man may have stopped growing

Thanks to treatment by researchers at the University of Virginia Medical Center, the world's tallest man, 29-year-old Sultan Kosen of Turkey, may have reached his peak at 8-feet-3 inches.