NASA Teams Up With Hoverboard Company to Build a Magnetic "Tractor Beam"
• http://gizmodo.com, Maddie StoneWhen Arx Pax unveiled its "hoverboard" last year, we had a hunch that this was but the first demonstration of the company's new magnetic field technology. Why was Arx Pax really messing around with magnets? For one, to build a tractor beam.