The tornado that destroyed my hometown was born in an otherwise unremarkable atmospheric collision over the American Central Plains. On May 22, 2011, a geostationary satellite 22,300 miles overhead recorded a large collection of cloud lines drifting over southeastern Kansas. At around 2 p.m, one of the cloud lines exploded, like a cartographic-scale dry-ice bomb.
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.