A meteorite streaked through the sky Friday morning, exploding over central Russia. Plant your eyeballs here for the latest updates. 3:15 p.m. EST:Russia Today writes that the estimated cost of damage has been revised down from 1 billion rubles to 400 million rubles, or about $13 million.
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.