Today in pretty space pics: Comet Lovejoy, still alive and heading back out toward the far reaches of the solar system, as seen from the International Space Station. This photograph was snapped yesterday as the ISS passed over Australia by Dan Burbank, one of the station’s current crew members. And needless to say, it’s one of those once-in-a-lifetime shots.
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.