Terry Gross

Twenty years ago, Italian food was regarded as cheap, peasant food. Now it's served on menus worldwide and considered to be one of the healthiest cuisines. Esquire Magazine's food critic John Mariani chronicles the story of pizza, macaroni and red sauce in How Italian Food Conquered the World.

Physician Kevin Patterson has treated patients in the Arctic, in Kandahar and on remote Pacific Islands. He says that Western ideas and effects of urbanization are making people everywhere in the world both fatter and sicker.

Dan Savage is an advice columnist who spawned a worldwide movement after hearing one too many times about anguished gay teens committing suicide. Savage and his husband, Terry Miller, talk about their "It Gets Better" project, which now has over 10,000 video submissions.