All Things Considered

Scientists say they have figured out how an experimental drug called ketamine is able to relieve major depression in hours instead of weeks.

Researchers from Yale and the National Institute of Mental Health say ketamine seems to cause a burst of new connections to form between nerve cells in parts of the brain involved in emotion and mood.

The story of the birth of accounting begins with numbers. In the 1400s, much of Europe was still using Roman numerals, and finding it really hard to easily add or subtract. (Try adding MCVI to XCIV.)

But fortunately, Arabic numerals (1, 2, 3, 4, etc.) started catching on, and with those numbers, merchants in Venice developed a revolutionary system we now call "double-entry" bookkeeping. This is how it works:

How much extra would you pay for local food? It's a familiar question. We face it practically every time we shop for groceries, either at the store or at the farmers market. But what about food that can save the lives of severely malnourished children?

On a farm in Waitsfield, Vt., in 1945, a Merchant Marine cook named Ralph Ellison was resting after his tour of duty.

"One morning scribbling, I wrote the first sentence of what later became The Invisible Man: 'I am an invisible man,' " Ellison recalled in an interview for National Educational Television.

He wrote that his protagonist — a Negro, as Ellison always put it — was young, powerless and ambitious for the role of leadership, a role at which he was doomed to fail.

If there is one thing that the mobile-computing era has made clear, it's that kids love touch screens. Because those touch screens — smartphones, iPads, Kindles and the like — are an inevitable added distraction to the classroom, schools across the country are struggling to deal with the growing prevalence of the technology.

But a growing number of schools are embracing these hand-held, Internet-ready devices by creating policies that put them to use in the classroom.

Guitarist Ernest Ranglin is an elder statesman of Jamaican music. A self-styled composer and improviser, he has traveled and collaborated widely during his 80 years. In California last year, he teamed up with three much younger musicians from South Africa, the U.S. and Israel. The four musicians bonded and quickly recorded an album, named for the San Francisco street where they rehearsed: Avila.