We’ve known for a long time that Amazon.com founder Jeff Bezos has been
building a supersecret spacecraft in his remote Texas lair. We knew the
company was called Blue Origin but didn’t really know what his vehicle
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.