About a year ago, when resident mad scientist Theo Gray pitched me a Gray Matter column on liquid oxygen, an extremelyflammable energetic form of the element, he first proposed showing how to use it to light a grill nearly instantaneously. The lawyers, however, suggested we go a more tame route, so instead we showed how you could make a few drops of the hooch yourself.
But of course, when left to his own devices (and free of legal oversight), Theo couldn't help himself.
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.