Ahmad Ashkar sells falafel. He makes money and feeds refugees at the same time. It's a new business model, and it's working.
Four U.S. research centers are developing technologies that can turn certain plants — such as switchgrass, poplar or sorghum — into biofuels.
The Harlem Globetrotters have wowed fans with comic basketball feats for decades. They also do a lot of good — like helping to stop bullying.
The most recent gift from the U.S. Library of Congress to the world is a collection of more than 2,500 stunning Japanese woodblock prints.
For years, crowds have flocked to world's fairs to see the latest inventions and have a good time. See the history of U.S. world's fairs in pictures!
A breakthrough battery has been developed that could change how we power our electric vehicles and help improve energy security around the world.
Wind energy has come a long way. Today it's more efficient and cheaper than ever. What do you think you know about wind energy that isn't true?
The rural town !Kheis in South Africa is cooler than ever before with a simple, energy-efficient technology to keep buildings cool.
It only took a few years — and good planning — to make big oil producer Texas the leader in U.S. wind energy.