Florida had seven of the top 25 growing cities, and Texas had five. Brownsville/McAllen, Texas, ranked 21 and Tyler, Texas, was 22.

Why do some of Houston's sidewalks and curbs have tile signs? Where does Houston's love of the light blue come from?

The humble ZIP Code shows up in all kinds of surprising places. Planet Money looks at how it was born, how it transformed the mail and talks to one researcher who argues that it's gone too far.

Houston residents feel the effects of the city’s lack of zoning every day – just look at all the strip malls. But why does ...