Well, that didn't take long. Only two weeks after Barnes and Noble's Nook e-Book reader hit the shelves, hackers have already posted instructions for converting the machine into an Android tablet PC with a free cellular Internet connection. And while no applications currently exist for the reset reader, that's sure to change.
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.