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More same-sex married couples are likely to avail themselves of federal benefits now that the Supreme Court has struck down the Defense of Marriage Act. But precisely how many may do so is difficult to estimate — because no one knows exactly how many legally married same-sex couples live in the U.S.

President Obama is preparing to conclude his trip to Africa. The last leg of his trip is Tanzania, where he continues to press U.S. companies to invest in Africa. A new initiative is going to try to get rid of the road blocks that slow down trade in Africa.

The former cricket star has been on the margins of Pakistani politics for close to 20 years. Despite a fall that put him in the hospital this week, his movement may win considerable support in Saturday's parliamentary election.

Just a fragment of genes in bat guano was enough for researchers trying to find out how a deadly new virus spreads. It's the first time the Middle East respiratory syndrome virus has been found in an animal, and offers strong evidence that bats carry the virus.

David Beckham, who starred for Manchester United, Real Madrid, and England's national team before heading to the United States and Paris, is retiring at age 38. The news was confirmed Thursday by England's Football Association. He appeared for England in 115 games.

Entrepreneurs, investors and data geeks descended on Washington, D.C., in pursuit of better ways to make health information useful for consumers. They urged bureaucrats to set the health data free.

Treating depression is a hit-or-miss process; the first treatment works less than half the time. Scientists say they may be able to use PET brain scans to tell whether antidepressants or cognitive behavioral therapy will work best. But tailored treatments are still far off.

A beer-cocktail combo popular in 19th century England is seeing a global revival. Shandies are tasty, fruity and practically scream summertime. They're also lower in alcohol than a regular beer, which makes them more appealing as governments tighten rules on drinking and driving.

Biologists who study the lives of animals can learn a lot simply by listening to them. The problem is that natural sounds can be far easier to record than to analyze. So scientists are working to automate the process with automated systems that do the identifying for them.

Alan Rosenthal, a giant in the study of state legislatures, was also a leading figure in changing the way they operated. He died this month, at 81.