Morning Edition

Enter the glorious Rose Reading Room on the third floor of the New York Public Library on a weekday afternoon, and you'll find almost every chair filled.

Scholars and researchers still submit their book requests on slips of paper and wait for their numbers to appear on two large boards.

The stacks, filled with some 3 million volumes, are closed to the public, so books are retrieved from seven floors of shelving below. Still other volumes are stored off-site.

NPR Morning Edition host Steve Inskeep is taking a Revolutionary Road Trip across North Africa to see how the countries that staged revolutions last year are remaking themselves. Steve and his team are traveling some 2,000 miles from Tunisia's ancient city of Carthage, across the deserts of Libya and on to Egypt's megacity of Cairo. Near the Libyan coastal city of Misrata, he looks at violence that took place after the revolution.

When Dr. Barbara Natterson-Horowitz was asked to treat an exotic little monkey with heart failure at the Los Angeles Zoo, she learned that monkeys can suffer heart attacks from extreme stress — just like humans. That's when the cardiologist realized she'd never thought to look beyond her own species for insights into disease.