CES has barely started, and already the smartphones are coming fast and furious. It's tough to keep track, especially when so many share similar specs, but there are some that you should know about. So far, we've got the LG Optimus Black (world's thinnest), the Samsung Infuse 4G (with a massive 4.5-inch screen), and the Motorola Atrix 4G (which can turn into a laptop).
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.