When even an $18,000 Honda offers a navigation system, an $81,000 luxury sedan has to work harder to impress. For BMW’s 7-Series, the techno lures include computer-enhanced performance from the twin-turbocharged V8 and enough gizmos to equip the cockpit of the Starship Enterprise. We spent more than 1,000 miles testing and grading the 750i.
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.