Last week, pictures emerged allegedly depicting China’s new J-20 stealth aircraft undergoing taxiing tests at a test airfield near Chengdu. This week, a fresh photo of dubious authenticity shows China’s new stealth plane taking flight (maybe). So has China successfully taken its stealth technology to the skies, and if so what does that mean for the U.S. and the balance of defense tech in the Pacific.
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.