Computerized testing of athletes for concussion isn't a reliable gauge of their brain health or fitness to return to play, according to new research. The computerized tests are used in the NFL and NHL, and in many colleges and high schools.

The once-booming clean-tech industry is facing hard times, in part because of cheaper natural gas, the effects of the financial crisis, China's growing solar industry and the Solyndra bankruptcy. Reporter Juliet Eilperin, who covers the industry's struggles in Wired's February issue, explains.

Nearly a quarter of U.S. public high school students fail to graduate on time, or at all. The president wants a rule requiring students to stay in school until age 18. But even with the requirement, Washington, D.C. has one of the lowest graduation rates. Host Michel Martin speaks with WAMU's Kavitha Cardoza and former dropout, Rashida Harris.

This weekend, millions of Americans will watch the New England Patriots face-off against the New York Giants in Super Bowl XLVI, held in Indianapolis. Host Michel Martin speaks with Mayor Greg Ballard about why his city is a good venue for one of the biggest sporting events in America.

Six women in a Texas prison have compiled a cookbook called From The Big House To Your House. The women must cook using a hot pot. They can't boil water, since that could become a weapon. They don't have access to a stove, refrigerator or a knife.

It's that time again. Time for Americans to pause and watch as a groundhog supposedly tells us whether winter's going to continue. He saw his shadow, so Phil says it will.