Terry Gross

Traffic congestion is the bane of any commuter's morning ride to work. Tom Vanderbilt, the author of Traffic: Why We Drive the Way We Do, talks about the behavior that leads to gridlock — and other vehicular annoyances.

The quest to understand what makes us us has long been one of humankind's great pursuits. Neuroscientist Michael Gazzaniga has made progress: He's the author of Human: The Science Behind What Makes Us Unique.

To win this coming election, presidential candidate John McCain must prove that he is as strong on the economy as he is on military and foreign affairs. His senior economic adviser, Douglas Holtz-Eakin, discusses McCain's approach to economic policy.