What kills people and why; the hunt for the number one killer.
Where people live in the U.S. and why; the influence of seven inventions that moved people out, up, down and out.
The changing size and shape of the average American.
An investigation of people's free time to see where it goes and how to make more of it.
A look at who earns what, who's better off, how that's changed and what it buys everyone.
How the landscape of the country is changed by the size of people's homes and the stuff they fill them with.