I was concerned, I'll now admit, that the all-new Hummer H2 would be a wannabe dressed in battle fatigues. And I had good reason: To keep the price only a notch or two above reasonable, the H2 is built on GM's full-size truck platform. Nothing wrong there, provided your aim is to build a Chevy Tahoe.
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.