Perhaps not content to rule the world of ping-pong with its elite human players, researchers in China have created fully functional robot ping-pong players, and they've got game.

The multi-purpose sport court is a tradition that goes back to elementary school P.E., when one of the most crucial lessons for any child to learn was how to differentiate the mauve lines of the badminton court from the puce lines of the volleyball court. That nightmare is now over: LED technology means that lines can now be swapped on the fly.

Muscle memory is an important part of being a top athlete, so it only makes sense that an interactive product designer has now invented a wearable training system for baseball pitchers based on another important sensory tool, sound.

Pitching in baseball can be a dangerous job. After all, you're throwing a ball to a guy trying to slam it back in your general direction at blazing speeds. So why don't pitchers wear helmets? Well, that may change soon.