The most recognizable cyclist in the world, Lance Armstrong, ended a battle Thursday night over allegations that he used performing-enhancing drugs. He continued to deny any doping during the course of his career, but acknowledged he would stop contesting charges…

During her 42-hour attempted swim from Cuba to Key West this week, Diana Nyad battled extreme exhaustion, severe sunburn, strained muscles, powerful storms and circling sharks. But the thing that really ground the 103-mile trek to a halt, she said,…

U.S. swimmer Diana Nyad, right, gestures before her departure from the Ernest Hemingway Nautical Club in Havana on Aug. 18, 2012. (Photo by Adalberto Roque/AFP/GettyImages) Diana Nyad had left no corner untucked in preparations for her fourth attempt to…