There are all kinds of ways to check your phone for updates like new email, ranging from audible alarms to vibrations to little blinking lights. But how about something more...tactile? A new casing for cellphones encourages you to squeeze your phone--the level of turgidity or flaccidity indicates what's happening inside. It's not as erotic as it sounds.
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.