Public University of Navarra

Electricity is chaotic, and we normally need to constrain it to wires and circuits to make use of it. Scientists in Europe and Canada have now managed to guide sparks through thin air and even around obstacles using ultrasound waves.

An advanced "sound tweezer" can manipulate dozens of objects independently using hundreds of tiny speakers, allowing for noninvasive surgery and a new, highly interactive type of 3D display.