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Search and rescue operations at the wreck of the Costa Concordia have resumed, after being halted for a third time, due to choppy waters and the partially submerged vessel's tendency to shift on the rocks near Italy's coast.

Accused of copyright infringement and conspiracy, the file-sharing site's founder and three others are being held in a New Zealand jail. Meanwhile, the site has one webpage up and running.

Each tear you shed contains an army of enzymatic Pac-Men, ready to chase down and gobble up germs before they infect the sensitive tissues around your eye. Now scientists have found just one molecule of the germ-fighting enzyme is a potent defender.

The International Maritime Organization has decreed that by 2015, all large deep sea ships will be required to carry the latest in electronic navigation equipment. But does state-of-the-art navigation technology prevent shipwrecks like last week's off the Italian coast? University of Southern Mississippi hydrographer Max van Norden talks about the technology.

The National Center for Science Education has long defended educators' right to teach evolution in public schools. Now climate science too is under attack. NCSE executive director Eugenie Scott talks about how teachers and parents can fight the push to get climate change denial into the classroom.

Scientists have confirmed that rocks collected recently in the Moroccan desert came from the Red Planet. University of Alberta meteorite expert Chris Herd, who has acquired one of the chunks, talks about how scientists analyze space rocks, and whether organic compounds might be found inside.

Saturday is the second anniversary of the Supreme Court's Citizens United decision, a key element in establishing the big-dollar superPACs now influencing the presidential campaign. It's also primary day in South Carolina, where a superPAC backing Newt Gingrich has been blasting away at Mitt Romney.

In his book Mindfulness: An Eight-Week Plan for Finding Peace in a Frantic World, Oxford University clinical psychologist Mark Williams talks about the brain and body benefits of mindfulness meditation, a cognitive behavioral therapy that can be as effective as drugs at staving off recurring bouts of depression.

The arrests in New Zealand of four people wanted by the U.S. for alleged online piracy raise a number of questions. NPR asks two experts for answers.

South Carolina's Lancaster County is solid Republican country — it went for John McCain over President Obama in 2008. It also has a 12.3 percent unemployment rate, which will likely affect how people in Lancaster County vote in Saturday's GOP primary.