Private spaceflight concern SpaceX has been teasing the public for more than a week with rumblings of a big announcement today. Indeed, that announcement is big: about 22 stories big. SpaceX founder Elon Musk today unveiled the company’s next big thing, the Falcon Heavy rocket, a massive launch vehicle with a cargo capacity of 117,000 pounds.
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.