All Things Considered on 90.5 WKAR

The government's employment report for April comes out Friday. It's an important measure of the economy's health and the advance signals have been mixed. One report this week showed layoffs falling to a five-year low, but another suggests disappointing jobs creation.

At least one sector is providing some positive news for the job market: housing.

A smartphone can tell you where to get a cup of coffee, but it can't go get the coffee for you. Engineers would like to build little machines that can do stuff. They would be useful for a lot more than coffee, if we could figure out how to make them work.

But the rules of mechanics change at small scales. Friction becomes dominant; turbulence can upend a small airplane.

Jordan's fastest-growing city lies in the middle of the desert, where the sand is so white that from a distance it looks like snow. There's little running water and not much electricity.

The name of this place? The Zaatari refugee camp, home to more than 100,000 Syrian refugees.

"This is a city — not one that anybody would want to create if they had a choice," says Caroline Gluck of Oxfam, one of the aid agencies working in the Zaatari camp. "It's certainly not urban planning at its best."

Tucked in the northeast corner of Africa, Eritrea is one of the most closed societies in the world, so much so that it's sometimes dubbed the "North Korea of Africa."

President Isaias Afwerki does not tolerate any independent media. The Internet is restricted. Reporters without Borders recently named it 179th out of 179 countries for freedom of expression.

"First they ate their horses, and then fed upon their dogs and cats, as well as rats, mice and snakes."

So says James Horn of the historical group Colonial Williamsburg, paraphrasing an account by colony leader George Percy of what conditions were like for the hundreds of men and women stranded in Jamestown, Va., with little food in the dead of winter in 1609.

They even ate their shoes. And, apparently, at least one person.

This week, major retailers including Wal-Mart, Gap and others met with labor activists in Germany, hoping to hammer out a deal to improve working conditions in Bangladesh.

The meeting came less than a week after a devastating building collapse in the Bangladeshi capital, Dhaka, killed more than 400 workers. At the meeting, activists pushed retailers who use factories in Bangladesh to start spending their own money to make those workplaces safer.

Mutations on a single gene appear to increase the risk for both an unusual sleep disorder and migraines, a team reports in Science Translational Medicine.

The finding could help explain the links between sleep problems and migraines. It also should make it easier to find new drugs to treat migraines, researchers say.

And for one member of the research team, Emily Bates, the discovery represents a personal victory.

You expect to find great trees in city parks and botanical gardens. But you might not expect to find ancient or unusual trees in the inner city or smack dab in the middle of a highway.

Benjamin Swett has a love of trees so deep that he's written pamphlets about them, created photo exhibits and now has a new book, New York City of Trees. His book has pictures and stories of some 60 trees in the city.

I took a walk with him to some of the great trees, often in unexpected places.

The Salinas Valley in Northern California grows about 80 percent of the country's lettuce, and it takes a lot of people to pick and pack it. In a field owned by Duda Farm Fresh Foods, a dozen lechugueros, or lettuce pickers, are bent at the waist, cutting heads of iceberg lettuce. They work frantically to stay in front of a line of 12 more packers, who seal them with tape and toss them onto a conveyor belt.