In 2010 Jordan Romero followed in the footsteps of famed mountaineer Edmund Hillary, climbing five and a half miles into the sky to step onto the summit of Mount Everest in Nepal. Many men have made that formidable trek to plant their flag on the highest peak on earth, but this trip was different. Romero conquered Everest at age 13. Photo Charles Allmon | National Geographic Stock Over the past few years the world has watched Romero and several other teen sportsmen chase ambitious, sometimes record-setting, goals. The journeys they’ve embarked upon would be thrilling and more than a little frightening for even adults at the top of their game. Earlier this year, 16-year-old Laura Dekker of Holland pulled into port after sailing around…