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Rick Santorum racked up victories in Alabama and Mississippi on Tuesday, again denying Mitt Romney the mantle of inevitability he has sought for weeks. Romney will be favored in the next big contest in Illinois, but he'll have a long wait before being able to deliver a knockout blow to his rivals.

Rick Santorum racked up two wins in the South, Newt Gingrich vowed to stay in the race until Tampa, and Mitt Romney failed to put doubts about his candidacy to rest.

Saturated fat, the stuff in meat and dairy foods, was associated with lower sperm counts, in a study of 99 men who were clients of fertility clinics. The results, though preliminary, suggest there's something men can do to boost the odds their sperm are up to their evolutionary task: eat better.

The American and British leaders reaffirmed their commitment to gradually withdrawing most forces by the end of 2014.

The Israeli government wants America's support and help for any possible attack on Iran. U.S. officials have said this isn't the right time for airstrikes. New York Times Washington correspondent David Sanger explains what's at stake for both sides.

Listen to conversations these days, and you may notice that responses such as "thank you" and "you're welcome" have fallen by the wayside in favor of the casual "got it" and "you bet." Are we finding new ways to say old, polite phrases? Are good manners merely morphing? Or are they fading away altogether?

All was not gloom and doom for the on-again, off-again, on-again frontrunner for the Republican presidential nomination. A new Pew Research poll indicated that Romney was once again the clear favorite nationally among Republicans and GOP-leaning independents for the nomination, leading Rick Santorum 33 to 24 percent in a poll that was in the field through Sunday.

A new study finds that in some cities the odds of "century" floods could double and even triple because of rising sea levels. The most vulnerable state is Florida.

In the first court ruling handed down by the International Criminal Court, warlord Thomas Lubanga from the Democratic Republic of the Congo is convicted of recruiting thousands of child soldiers.

A set of 13th-century Byzantine frescoes — plundered after Turkey invaded the island nation and on display in Houston for the last 15 years — is being repatriated. NPR's Wade Goodwyn reports on the closing chapter in what turns out to be a remarkable odyssey.