Talk of the Nation on KAZU

David Matsumoto, a psychology professor at San Francisco State University, trains national security officials and police officers to recognize "microexpressions"--fleeting, split-second flashes of emotion across someone's face. Matsumoto says those subtle cues may reveal how an interview subject is feeling, helping officials to hone their line of questioning.

How long can you go without checking email, or glancing at your smartphone? Clifford Nass, a psychology professor at Stanford University, says today's nonstop multitasking actually wastes more time than it saves--and he says there's evidence it may be killing our concentration and creativity too.

Saul Perlmutter shared the 2011 Nobel Prize in physics for his discovery that the universe was expanding at an accelerating rate. Perlmutter explains how supernovae and other astronomical artifacts are used to measure the expansion rate, and explains what physicists are learning about "dark energy" — the mysterious entity thought to be driving the acceleration.

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan.

This week, the country celebrated the story of three women liberated 10 years after they were kidnapped and held all that time in a house in Cleveland. But there's another person in this story who made headlines: Charles Ramsey. He's the animated neighbor who helped rescue Amanda Berry, Gina DeJesus and Michelle Knight.

(SOUNDBITE OF ARCHIVED INTERVIEW)

Buzz Aldrin's name is practically synonymous with space exploration. As one of only 12 people to ever set foot on the moon, the former astronaut is a pioneer in the field.

Today, Aldrin continues to advocate for what he considers the next phase of space discovery — putting humans on the red planet. Host Neal Conan talks with Aldrin about his experience as an astronaut, his new book, Mission to Mars: My Vision for Space Exploration and his ideas for the future on Mars.