Automobiles

By cutting down on steel and other heavy materials, vehicles can be made lighter, boosting energy efficiency

Hydrogen fuel cell vehicles remain rare but could find an ally in newly abundant and cheap natural gas

Clean-car mass production has struggled in China both due to faults with the vehicles and the government incentives designed to promote them

Despite the prospect of less reliance on oil, electric vehicles are not proving popular with the car-buying public

New cars and trucks could improve fuel efficiency by 50 percent if existing technologies such as hybrids are adopted

An aerodynamic activity from Science Buddies

Michigan is pilot testing vehicle-to-vehicle signals that lets cars, trucks and buses alert drivers to danger

Data from the world's most concentrated neighborhood of Chevy Volts reveals when owners are actually charging their cars

After successfully completing its complex series of landing maneuvers, the Curiosity rover is on the Martian surface and ready to begin exploration. John Matson reports