The Dutch scientist at the center of the controversy over recent bird flu experiments says that his team applied for government permission today to submit a paper describing their research to a science journal.

The Dutch government has asserted that the studies, which describe how to make bird flu virus more contagious, fall under regulations that control the export of weapons technology.

A curious — and good — thing has happened on the road to Obesity Nation: the share of the U.S. adult population with high cholesterol has dropped.

Data just out from the Centers for Disease Control and Prevention show that only 13.4 percent of adults in this country have high cholesterol, according to data collected in 2009 and 2010.

As many news outlets have put it, this might be a perfect case of life imitating art: Two Cuban actors, who star in a movie about about teenagers who decide to defect to the United States, have gone missing shortly after arriving in the United States for the Tribeca Film Festival premiere of Una Noche.

Six days later, Javier Núñez Florián and Anailín de la Rúa de la Torre are still missing and assumed to have defected.

On the day after he was arrested, George Zimmerman officially entered a "not guilty" plea to the charge of second-degree murder in the Feb. 26 death of Trayvon Martin, according to court records now posted online by Florida's 18th Circuit Court.

(Revised at 2:03 pm ET with new Ron Paul-Pennsylvania material.)

The contest for the Republican presidential nomination may be over for all practical purposes, with Mitt Romney the all-but-certain GOP nominee. But that doesn't mean there's nothing of interest in Tuesday's primaries.

Voters are going to polls in Pennsylvania, Rhode Island, Connecticut, Delaware and New York, though turnout is expected to be low. Still, here are four things to watch for.

Sudan and South Sudan are careering closer to a full-scale war, with fighting along their ill-defined border and belligerent rhetoric coming from both sides.

The conflict threatens to cripple the fragile economies in both nations, and it could create new burdens on neighboring countries in east and central Africa, a region prone to humanitarian disaster.

In the latest developments, South Sudanese officials say that Sudan's air force bombed its territory for a second straight day on Tuesday.

I have to admit I was a bit reluctant when I first saw this series of "Bicycle Portraits" because biking has, in some cases, become something of a cliche steeped in hipdom sprinkled with granola. Or mainly: For NPR to present a series of bicycle portraits just seemed too cute, too predictable.