Is that the face of jolly old St. Nick, or a million-mile-wide nebula? The gas and dust of the cosmos often align into very familiar scenes from Earth. We've gathered nine space pictures that look just like your favorite Christmas things: Rudolph, snow angels, tree ornaments, and more.
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.