Self-driving cars can detect much of the world around them, but they're inherently limited by their reliance on line-of-sight vision. They're not so good at spotting the visual cues that a car is just around the corner -- you might spot the encroaching headlight beams, but a car might not. MIT's CSAIL team may have a solution, though. They've developed camera technology that uses subtle changes in lighting on the floor to determine what's around a corner. As objects reflect a small amount of light around walls, creating a "shadow," you can piece together images of objects around the corner by capturing video of the floor and tracking the shifting colors.