3-D images from laser system shows what's hidden behind walls

Researchers from the Massachusetts Institute of Technology (MIT), Harvard University, the University of Wisconsin, and Rice University have studied the erratic behavior of photons zooming around and bouncing off objects and walls inside a room and combined these photons with advanced optics to enable them to "see" what's hidden around the corner.

"Imagine photons as particles bouncing right off the walls and down a corridor and around a corner