The aircraft will one day be used to circumnavigate the globe.
New figures get beyond startup company hype.
A U.S. competition showcases the fastest battery-powered cars and bikes.
Industry experts weigh in at a conference in Washington, DC.
New technology-sharing partnerships could help lead to a climate change agreement.
A battery that could store three times more energy than lithium-ion batteries gets funded.
A system for virtually linking cars could cut fuel consumption by 20 percent, and allow for hands-free driving.
Plans to purposefully re-engineer the world's climate got their first serious committee hearing yesterday.
Solar startups talk about how they hope to take on Chinese firms.
The question is, could that be a good thing?