An American teenager has become the youngest person to successfully climb to the summit of the tallest mountains on each of the seven continents. Fifteen year old Jordan Romero reached the summit of Mount Vinson Manssif in Antartica yesterday, the final peak in a quest he started six years ago. The teen beat the record previously held by 16-year old British climber George Atkinson. At the age of 10, Romero climbed Mount Kilimanjaro in Africa and at the age of 13, he climbed Mount Everest.