With 302 horses at your disposal, you'd think that stopping the 2002 Mercedes SL500 convertible would be an issue. Not so.
The car features the first brake-by-wire system. Hit the brakes and a computer begins slowing you within a fraction of a second. The system also determines which wheels have the most traction and applies the brakes accordingly to prevent a skid.
And just in case it pulls a Windows 98 on you, hydraulics act as a backup. Available next spring; price not set.
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.