While IBM is primarily known for its information technology products, the company has recently begun expanding into the alternative energy market. So far, that change has mainly taken the form of a new ad campaign. But IBM is now backing those words up with action, by unveiling a groundbreaking solar cell, 40 percent more efficient than any similar cells.
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.