On Friday the fastest men in water take to the pool at the Aquatics Centre for the finals of the 50m freestyle. In the semifinals, American champ Cullen Jones and world record holder Cesar Cielo finished in a dead heat with Anthony Irvin, the American gold medalist in the event at the 2000 Olympics, finishing just behind them.
Will these guys break the world record? Well, while years of training may have their bodies primed to do so, there is one thing out of their control with how fast they can go, and that's the design of the pool. Making a "fast" Olympic pool is so much more than just digging a hole in the ground and pouring some water and chlorine in. This video courtesy of NBC Learn and the National Science Foundation helps explain how engineers designed the pool for the London Games.