Sure, football arenas like Levi's Stadium are being outfitted with everything modern technology has to offer, but what about the game itself? Don't worry, researchers are working on improving that too: engineers at Carnegie Mellon and NC State have developed a football tracking system that could one day replace the old "stick-and-chain" measurement system for calling a first down. It's called the Magneto-Track system, and it uses low-frequency magnetic fields to follow a tracker embedded in the game ball. The result? A real-time measurement of the ball's position and orientation on the field.