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Travel through wormholes is possible, but slow

A Harvard physicist has shown that wormholes can exist: tunnels in curved space-time, connecting two distant places, through which travel is possible.

Aviation faces challenge to reduce pollution

Aviation has boomed in the past decades, with low-cost airlines helping make travel affordable to more people, but the industry faces a major challenge to play its part in cutting emissions responsible for global warming.

'Flight shame' has Swedes rethinking air travel

Saddled with long dark winters at home, Swedes have for decades been frequent flyers seeking out sunnier climes, but a growing number are changing their ways because of air travel's impact on the climate.

Rocket fuel that's cleaner, safer and still full of energy

Research published this week in Science Advances shows that it may be possible to create rocket fuel that is much cleaner and safer than the hypergolic fuels that are commonly used today. And still just as effective. The ...

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