Terry Gross

The 83-year-old former poet laureate reflects on how life has changed as he's grown older. "My body causes me trouble when I cross the room, but when I am sitting down writing, I am in my heaven — my old heaven," he says.

Yoga can be extremely beneficial, but it also can be quite dangerous. Pulitzer Prize-winning journalist William Broad examines the pleasures and pitfalls of the practice in his latest book, The Science of Yoga.

Meryl Streep won a Golden Globe for her performance as Margaret Thatcher in The Iron Lady. She talks about preparing for that role, her other films and how her perceptions of herself have changed over the years.