
Will Trackless Trams Gain Traction in the U.S.?
A hybrid form of transportation could be an alternative to buses or light rails

Will Trackless Trams Gain Traction in the U.S.?
A hybrid form of transportation could be an alternative to buses or light rails

Want Greener Cars? Focus on Fuel Efficiency
Electric cars are great, but higher fuel economy for vehicles of all sizes is better


Rotating Sails Help to Revive Wind-Powered Shipping
A century-old concept, Flettner rotors, gets a fresh look as shippers cut back fuel

Birdlike Flight Formations Could Cut Airline Emissions
A bioinspired arrangement could save energy by allowing one plane to provide extra lift to another—if both aircraft can remain stable

Electric Aviation Could Be Closer Than You Think
Enabling air travel to decarbonize

Quantum Sensors Could Let Autonomous Cars ‘See’ around Corners
High-precision metrology based on the peculiarities of the subatomic world

Energy Department Looks to Boost Hydrogen Fuel for Big Trucks
Hydrogen fuel weighs less than electric batteries, making it an attractive option for long-haul vehicles

The First Subway in New York City Was a Cylindrical Car Pushed by Air
Scientific American editor Alfred Ely Beach revealed the secretly built wonder in 1870

Search for a Cleaner Jet Fuel Leads to Sewage Plants
Researchers aim to short-circuit the decay process in organic waste to produce a potent, less carbon-intensive fuel

Drop in Global Travel May Have Hurt Weather Forecasts
Commercial planes and ships usually gather valuable data to feed into weather models

High-Tech Ghost Ships Will Set Sail sans Sailors
Maritime technology groups are building robotic vessels to cross the oceans

Silent and Simple Ion Engine Powers a Plane with No Moving Parts
Researchers fly the first atmospheric aircraft to use space-proven ionic thrust technology