Talk of the Nation on AM 870 NewsTalk

President Bashar Assad and his opposition continue to crack down on rebels in Syria. U.N. envoy Kofi Annan met with Assad to try to broker a cease fire, but failed. The U.N. Security Council is drafting another resolution to support the Arab League request to have Assad step down from power.

Rick Santorum swept the Mississippi and Alabama primaries on Tuesday, leaving Mitt Romney a distant third. Newt Gingrich maintains he'll carry on, and third-place finisher Mitt Romney faces renewed doubts about his ability to win over conservative Republicans, though he's leading the delegate race.

Transcript

JENNIFER LUDDEN, HOST:

This is TALK OF THE NATION. I'm Jennifer Ludden in Washington; Neal Conan is away. We still don't know why a U.S. Army soldier allegedly murdered 16 men, women and children in Afghanistan. That investigation continues. The consequences, though, seem clear.

The families involved are devastated. The Taliban promises revenge. The Afghan Parliament issued a statement saying Afghans had run out of patience with foreign soldiers, and the New York Times reports that the Obama administration is debating a speedier pullout from the country.

An advertising agency sparked controversy at the South by Southwest technology conference when it hired homeless people in Austin to act as "Homeless Hotspots." Critics charge that it exploits the homeless. But Megan Garber, a staff writer for The Atlantic, sees some good in the project.

NPR's Jennifer Ludden reads from listener comments on previous show topics including the controversy over mapping Muslims, the jump in grey divorces, reaction to the viral video Kony 2012, and leaving the Catholic Church.

Comedians Keegan-Michael Key and Jordan Peele push stereotypes to new — and sometimes uncomfortable — levels in their jokes.

On stage, on MadTV and now in their Comedy Central show, Key & Peele, they find the humor in their biracial upbringings and the many roles of black men in America.

Transcript

JENNIFER LUDDEN, HOST:

This is TALK OF THE NATION. I'm Jennifer Ludden, in Washington. Neal Conan is away. Losing a loved one is, simply put, painful. Such separation brings extreme sadness that can feel sometimes too heavy to bear. The Irish writer C.S. Lewis chronicled his suffering and healing after his wife died of cancer at the age of 45.

In Afghanistan and other conflict zones, the military is often first on the ground, followed by diplomats, contractors and journalists. Next, in many cases, are aid workers: People who work for private organizations and strive to remain impartial in some of the world's most dangerous places.

The NFL found some two dozen players for the New Orleans Saints took part in a pay-for-hits program that paid bounties for knocking specific players out of games. Those involved likely face fines or suspensions. But lawyer Eldon Ham argues that doesn't go far enough, and proposes criminal charges.

A Department of Education study found from 2009 to 2010, black students were 3 1/2 times more likely to be suspended or expelled than white ones. Though the reasons are unclear, many argue harsher punishments push many black and Latino students out of schools and into the criminal justice system.

Chances are, you've fallen victim to earworms — pesky songs or melodies that get stuck in your head and just won't get out.

Research suggests that there are psychological reasons why some songs are more likely to stick, including memory triggers, emotional states, and even stress. Some researchers hope to better understand why this happens and figure out what, if anything, music memory can teach psychologists about how to treat patients dealing with memory loss.

Reporting in Nature, researchers write they have deciphered the genetic code of the gorilla, the last of the great apes to have its genome sequenced. Study co-author Aylwyn Scally discusses what the data reveal about the evolution of humans and other apes.

When you crunch into a potato chip or take a spoonful of chocolate mousse what you experience is more than just the taste of the food. In her book Taste What You're Missing, Barb Stuckey discusses why truly experiencing food involves all five senses and offers tips on how to get more enjoyment from your next meal.

Reporting in Cell Metabolism, researchers write that when people who lead relatively sedentary lives worked out the DNA in their muscle fibers changed almost immediately. Scientists also found caffeine had the same effect on isolated rodent muscles. Study co-author Juleen Zierath discusses the DNA modifications.

Between the resident emu and the newborn goats, Harvard's Concord Field Station, located in Bedford, Mass., has a menagerie feel. The lab researches how different animals move--which requires lots of animals, and gadgets to facilitate and document their motion.

Reporting in the Astrophysical Journal, scientists write of a massive collision between two galaxy clusters. By studying the cosmic remnants of that smashup, they say leftover dark matter isn't behaving as current theory predicts. Astrophysicist Andisheh Mahdavi discusses this dark matter mystery.

It's been an unusually warm winter in some parts of the country, with springtime temperatures and very little snow. How is nature responding? Purdue entomologist Tom Turpin and horticulturalist Kristin Schleiter of the New York Botanical Garden discuss how an early spring affects flower buds, beetles and bees.

The New Horizons Mission blasted off toward Pluto in 2006; it's on course to arrive in Pluto's neighborhood in 2015. Mission leader Alan Stern discusses the journey of the spacecraft, and why he thinks Pluto is still a planet. Plus, the mission to get Pluto on a commemorative stamp.

After the terrorist attacks on 9/11, some law enforcement agencies adapted crime mapping tactics into what is known as ethnic mapping. Some Muslims welcome ethnic mapping as a useful approach to preventing terrorism. Others say the surveillance amounts to domestic spying and racial profiling.

Kony 2012 is not your usual viral video. A thirty-minute film by the nonprofit group Invisible Children, it hopes to raise support for the arrest of Joseph Kony, the leader of the Lord's Resistance Army. Freelance reporter Michael Wilkerson fact checks the film and explains the controversy.