Holographic video is sort of the holy grail of video display technology right now. Stereoscopic 3-D is fine and everything, but it basically works by tricking the brain into seeing that 3-D depth via two offset 2-D images--hence the occasional headaches associated with current commercial 3-D displays. Holographic video, by contrast, creates images that are really three-dimensional, no glasses or headaches required.
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.