If you want to swim like a dolphin? The Geek engineer has developed a dolphin-inspired fin, called Lunocet(about $1,250-$1,500). It is a 2.5-pound (1.1-kilogram) monofin made of carbon fiber and fiberglass that attaches to an aluminum foot plate at a precise 30-degree angle. The fin spans almost 42-inch(a meter) wide, which with three times the surface area of conventional swim fins. They claimed that Lunocet users have already hit about eight miles (13 kilometers) per hour, nearly twice as fast as Olympic Gold Medal swimmer Michael Phelps at his speediest. "The mechanism functions like a wing to generate a lift force," which is directed forward and turned into thrust, says Frank Fish, a marine biologist at West Chester University of Pennsylvania.
