Morning Edition

Greece is broke. But there's no blueprint for a country to declare bankruptcy, so Greece's creditors are sort of making things up as they go along.

"You're taking some sort of loss," Hans Humes of Greylock Capital Management told me. "But it's like, how much of a loss do you take? There's this thing called sovereign immunity. You can't go in and take the Acropolis."

The twin ports of Los Angeles and Long Beach are the busiest in the nation. They also have some of the dirtiest air, thanks to thousands of cargo trucks that pass through each day.

But this month marks the beginning of a new era, as tighter emissions standards go into effect.

'100 Percent Clean Energy'

A common trope in environmental stories is to put things in terms of jobs vs. the environment. But that's not what happened in the case of the ports.

Every year, thousands of video-game fans flock to the Washington, D.C., metropolitan area for a unique music festival called MAGFest. It's short for "Music and Gaming Festival," and it's designed to celebrate the music of video games.

As video-game technology keeps improving, the graphics become crisper, the action faster, and the sound quality richer. But for many gamers, the music from video games was best in the earlier days of low-tech 8-bit and 16-bit game systems.

Beyond The Limits Of Technology

Nathan Hoskins knew from an early age that he was gay. But when he was growing up in rural Kentucky, his mother took extreme steps to convince him otherwise.

"When I was in sixth grade, I had met a good friend and he wasn't interested in girls," Hoskins, who's now 33, tells his friend Sally Evans. "One day, he said, 'I have a Valentine's Day card for you.'"

"I asked him for it, and he said it was so special that he mailed it," he says. "And he didn't know he'd done a very terrible thing because at my house only one person got the mail — and that was my mother."

Once again, Friday the 13th is at hand, one of the most abiding superstitions despite little agreement about its origins. Superstitions date from a time when the workings of the physical world were unknown. Calamitous events such as earthquakes, solar eclipses, plagues and death seemingly came out of nowhere.

Many superstitions centered on birds, most likely because they fly high to the heavens where the gods were thought to hang out. Birds were seen as carrying messages from the gods, and because the gods wielded power capriciously the messages seldom were glad tidings.

You learned a remarkable property of H2O back in High School chemistry. Remember?

Normally, the density of compounds decreases as temperatures increase and molecules spread out. When temperatures fall, density increases as molecules become more tightly packed. Not true for ice – in fact, the exact opposite occurs!

In liquid form, each water molecule’s hydrogen is bonded to 3 other water molecules. In ice form, each molecule’s hydrogen bonded to 4 others. These hydrogen bonds form an open arrangement that is less compact than liquid water.

After months of campaigning, it's finally caucus day in Iowa. Polls still show a fluid race, with former Massachusetts Gov. Mitt Romney, Texas Rep. Ron Paul and former Pennsylvania Sen. Rick Santorum heading the pack.

Have you heard about coffee that's for the birds? There definitely is such a thing: shade-grown coffee. Until recently that's how all coffee grew: in the shade on small family farms. Canopy trees above provided shade along with a natural leaf mulch that kept soil moist, prevented soil erosion, and decomposed to provide nutrients. The canopy typically included fruit and nut trees that provided food for the farm family.

I admit to being a distracted driver at times, but it's not for the usual reasons. I'm looking for moose, but not the kind wildlife biologists usually look for. I'm looking for a small moose on car license plates.

For ten years now New Hampshire's moose license plates have raised significant funds for conservation of both historic and natural resources. Land has been conserved; loons and other endangered species protected; nature education brought into classrooms; historic buildings and covered bridges fixed up along with buildings in our state parks.

Millions of Americans wake up each morning without a job, even though they desperately want to work. It's one of the depressing legacies of the financial crisis and Great Recession.

NPR and the Kaiser Family Foundation conducted a poll of people who had been unemployed or with an insufficient level of work for more than a year. The results document the financial, emotional and physical effects of long-term unemployment and underemployment.

The natural world quiets down in December, both visually and audibly. Fall's riot of colors is long gone, and the bird song chorus is a distant memory. Not everyone embraces winter, but there is a positive way to view the impending season of cold, ice and snow. Without the overload of spring, summer and fall distractions, we're freed up to notice and appreciate the subtle winter world.

Here's a bird song we all recognize, the familiar crowing of, yes, crows, a species with many vocalizations. Crows are one of the most intelligent animals in the wild, and a lot of intelligent people have come up with theories to explain why.

Updated at 2:52 p.m. ET: Wal-Mart issued a statement Wednesday saying its request for partners to provide primary care services was "overwritten and incorrect." The firm is "not building a national, integrated low-cost primary health care platform," according to the statement by Dr. John Agwunobi, a senior vice president for health and wellness at the retailer.

Like other species in North America, the beaver suffered when the Europeans arrived, but they've staged an impressive comeback.