Martin Strel will pass through bodies of water in 100-plus countries
(Newser) -
Martin Strel swims with a knife strapped to his right leg—in case he encounters sharks, "vampire" fish, and other deadly marine life in the world's wildest waters. Yesterday, the 60-year-old marathon swimmer from Phoenix announced the toughest feat of his life: a 10,000-mile around-the-world voyage on...