The sport is no stunt, as swimmer Mackenzie Koeck and her support crew learned in the yearlong runup of preparation.

Which swim goggles are best? Over 90 million Americans swim in pools, lakes and oceans every year, and one-third of that group swims regularly for fitness. No matter where you swim, a good pair of ...

Aug. 3—Leszek Naziemiec is an avid ice swimmer. But even in the midst of summer, the 48-year-old from the northwest Poland village of Kołczewo couldn't resist a trip through the north Alaska ...

Swirling underwater eddies are aggressively melting two Antarctic glaciers, a recent study found, including the one that could raise sea levels by multiple feet.