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Newt Gingrich was the last presidential candidate to speak Friday at the Conservative Political Action Conference in Washington, D.C. And he kept his Romney powder dry, preferring instead to attack establishment Republicans who have not embraced the Gingrich campaign. To put it mildly.

Dengue fever, a nasty disease caused by a virus, is just beginning to show up in the U.S. It's carried from person to person by mosquitoes, and one researcher studying the spread is looking for clues in the age of the insects. But it's not very easy to tell how old a mosquito is.

Scientists in Hungary and Sweden say they've found an answer to the age-old question of how the zebra got its stripes. It turns out the pattern may have evolved to repel Africa's biting flies. The researchers discovered this by placing models of patterned zebras next to models of their plainer cousins, horses, and measuring how many flies ended up on each one. Host Scott Simon has more.

Syria's state-run news agency says a high-ranking military officer has been assassinated. NPR's Kelly McEvers reports the attack comes as violence in Syria is quickly escalating.

Bu the GOP presidential hopeful walked away without delegates in the nonbinding caucuses and tallied fewer votes in the state than he did four years ago. This time, he barely beat rival Ron Paul.

Photojournalist Eirini Vourloumis moved back to her hometown of Athens, Greece, to cover the economic crisis. She found her country unrecognizable.

Today, the idea of a "print" is so ubiquitous that many people take it for granted, or don't think of it as relevant to art. Philagrafika, an…

This week on News and Views we'll journey through gardens around the globe. "Passport to the World," the theme of this year's Philadelphia International…

As America navigates the politics of 2010, an exhibition in Philadelphia explores the ways in which our government and culture have been shaped by an…

Philadelphia, PA – Access to adequate healthcare is a challenge for close to 1.3 billion people worldwide. In Central America over 140 million people have…