The science of social networks

Can our friends make us fat? Is our neighbor's happiness contagious? The authors of a new book say our social networks are more powerful than we think.

Guests

• Nicholas Christakis, MD: Professor of medicine and medical sociology at Harvard Medical School and co-author of "Connected."
• James Fowler: Associate professor in the political science department at the University of California-San Diego and co-author of "Connected."

Resources

• Connected Book Web site
• About Nicholas Christakis
• About James Fowler