Terry Gross

Trey Parker and Matt Stone talk about their blasphemous, hilarious and oddly endearing Broadway hit, which led the Tony nominations field this year — and will probably go down in history as the only Broadway musical ever to combine Mormons, Uganda, filthy language and a chorus line.

Would you eat a steak grown in a laboratory? Science writer Michael Specter examines the progress scientists have made in developing test-tube meat. "Depending on what your definition of any sort of life is, this is as fundamental as any animal is," he says.

The world's rapidly expanding population has created elevated demand for food, but changes in climate and irrigation have made it increasingly difficult to boost production accordingly. Environmentalist Lester Brown explains why he believes "food is the new oil" and may lead to political upheaval.