Silicon Valley automotive start-up Tesla Motors is still prepping its Model S all-electric sedan for a 2011 launch. But today, the company slipped into tease mode, issuing the first driving shots of the Model S with zero camouflage. Will buyers bite on a BMW competitor that needs to be plugged in at night?
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.