The ability to store energy could revolutionize the way electricity is made and used. But for many utility companies and regular folks, energy storage is still too costly and difficult.
Thousands of grandparents in Massachusetts are having to raise their grandchildren, in many cases because the parents are addicted to opiates. The process is fraught with tension.
A California playground embraces the value of wild play.
Berlin is one of Europe's premiere cities, yet it lacks an airport befitting its status due to years of delays and cost overruns. The new airport was supposed open in 2012. Now the target is 2017.
In 2009, then-Veterans Affairs head Eric Shinseki declared that all homeless veterans would have housing by 2015. New Orleans has made big strides, but in Los Angeles, the problem persists.
In the past 10 years, the global blueberry crop has tripled. Yet the big, round commercial blueberry is a fairly recent innovation. It was created by breeders exactly 100 years ago, in New Jersey.
A huge legal battle is coming over the White House plan to address climate change with additional power plant regulations. The coal industry has the most to lose, and plans to take the EPA to court.
It's called yaupon. Native Americans once made a brew from its caffeinated leaves and traded them widely. With several companies now selling yaupon, it may be poised for a comeback.
The official recognition by the International Olympic Committee means that disc sports are now eligible for future Olympic Games.
Young entrepreneurs in Africa say they're leading a tech movement from the ground up. They think technology can solve social ills. But critics wonder if digital fixes can make a dent.