It's not unlikely that your grandparent used canning jars for their original purpose: canning. But here in the twenty-first-century kitchen, the hard-to-destroy, easy-to-seal jar has become valuable for many more purposes. We love it -- and not just because one of the most popular models is manufactured by aerospace pioneer Ball.
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.