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A recent study conducted at the University of Pennsylvania identified key molecules involved in forming long-term memories. Experts discuss how this is the latest in a growing field of research on how our bodies regulate our genes, and how this process affects our memories.

The eclectic performer has tackled her share of genres, but she says she is most inspired by singing styles that rattle the listener physically.

The FBI says there are strong preliminary indications that the killing of a Border Patrol agent earlier this week was accidental. Melissa Block talks with NPR's Ted Robbins about the ongoing investigation of the shooting along the Arizona-Mexico border.

As U.S. officials investigate the attack on the American Consulate in Benghazi, they are trying to determine if al-Qaida urged a Libyan group to launch the assault. If confirmed, this would point to a new al-Qaida tactic.

Retailers expect to hire hundreds of thousands of extra workers this holiday season to help with the anticipated spike in sales. But for seasonal retail workers, the hours can be scarce — and unpredictable — before the jobs disappear altogether following the holidays.

Mitt Romney said that pre-existing conditions would be covered under his health care plan. But his plan wouldn't guarantee that people who don't have coverage now will be able to buy it.

Over the past four decades, Benoit Rolland has made more than 1,400 bows for violins, violas and cellos.

Amid steady rain at a campaign rally in Cleveland Friday, President Obama had some sunny economic news to share. The unemployment rate fell to its lowest level since he took office. NPR's Scott Horsley reports from the campaign trail.

Friday, the MLB debuted its new playoff format: Two wild-card teams from each league played in a high-stakes, single-shot game to advance to the full playoffs. The Baltimore Orioles defeated the Texas Rangers, and the St. Louis Cardinals beat the Atlanta Braves. NPR's Tom Goldman speaks with host Scott Simon about those games and the Rockets' Royce White, who plays in the NBA with a generalized anxiety disorder.

The Labor Department announced on Friday the lowest unemployment rate since January 2009. Most big companies use software to screen resumes and ultimately move that unemployment number. These programs can be a big help for hiring departments, but a hindrance for job searches everywhere.