3-D TV is still experiencing some growing pains, in large part because of its reliance on bulky, uncomfortable and expensive active-shutter glasses. That’s now changing. A new wave of 3-D sets are using lighter glasses to make immersing yourself in the third dimension less cumbersome. Eventually, believable 3-D won’t require specs at all.
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.