What's the point of having a cellphone for emergencies if 911 dispatchers can't figure out where to send the paramedics? By 2005, all cellphones will be required by law to track their location. The first are here, including Samsung's GPS-enabled SPH-N300 and SPH-A460. Meanwhile, the Magnavox MobilePAL+GPS (left, top: $299) is a true emergency phone, with one red button that connects you to emergency services.
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.