Gold has long represented a safe haven for nervous investors, and the latest financial meltdown has again borne witness to skyrocketing gold prices. Now a German company hopes to capitalize on public distrust of banks by putting real, solid gold bars into those sweaty hands via vending machines, the first of which was just installed in Frankfurt Airport. Right next to the iPod machine.
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.