A woman has described the "chaotic" moment she was hit by a wave and lost her prosthetic leg during her first open-water swim ...

Leftwich began to think about sea lions’ method of swimming with their front flippers rather than their hind flippers. The mammals are efficient swimmers and produce almost no wake. In ...

Video by Sarah Joseph and Jon Betz, Smithsonian Digital Studio; Text by Megan Gambino Benjamin Franklin invented swim flippers when he was 12 years old. Frank Epperson, age 11, conceived of the ...