A sub-centimeter mapping technology used by the Mars rovers and other robots is now on the iPad, where it can be used to build real-time 3-D maps of your environment. What better use for this than an augmented-reality first-person shooter game?
Mobile augmented-reality (AR) apps already enhance live video images on your phone to show you real-time info about what’s around you. Upcoming systems take it a step further by actually letting you interact—whether by touching or talking—with miniature virtual worlds.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.