Talk of the Nation on KAZU

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.

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.

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. At the beginning of this week, as we absorb news of Israeli air strikes outside Damascus and questions about nerve gas and red lines, there was a report that a Shiite shrine near the Syrian capital had been ransacked by Sunni extremists and the body of a Shia holy man exhumed and hidden away.

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)

Transcript

NEAL CONAN, HOST: