This crazy fin thing was developed by DARPA for scuba divers to swim 150% faster and with less effort than regular fins, helping to get places quicker and preserve oxygen along the way. Modeled after observing swimming habits of penguins and dolphins, it takes the strain away from smaller leg muscles, instead working the glutes and quads. It was intended for Navy SEALs (duh), but maybe one day we'll all get a crack at it. The shot above is newly released on CNet. After the jump is a schematic rendering from the original Popular Mechanics story.
@saileng: I hope the inventor got this patented, and I hope he sues their stupid ignorant know-nothing retarded idiotic brain-dead backwards thinking asses off and WINS. The military is such an ineptly run (money-wise) program. The big story back in the 70s was the 2000$$ hammer (or something to that effect) but they still do that shit and much much worse. Then when someone comes along with a stellar idea they poo-poo it at first, then after it clearly has beaten all expectations and claims, they sideline the concept only to bring it up 20 years later without giving the original thinker the credit. Priceless.