They can act as economic engines for entire countries.
"We face a catastrophe in future years unless we act now."
The long road from "go west, young man" to "stay put, everyone."
The state is facing what could be its worst water-shortage in four decades.
Where one man's fascination with burgers and New York's MTA intersect.
Brits and Indonesians may not be happy with the results.
A new map showing the carbon footprint for nearly every zip code indicates that suburbs are powerful greenhouse-gas emitters.
12 cartographic experiments that changed cartography.
Which cities attract the most people, and what kinds of communities are losing them.
Once, a traveler could expect to spend a whole day and night traveling what a suburban commuter now does in an hour.
Parts of California and New York are much richer than Washington, but they often belong to larger counties that include areas with poorer residents.
Even in an era of cheap, digital communication, most of us are still talking to our neighbors.
The city must decide soon whether to keep the project going — or pay back $45 million in federal funding.
The Census Bureau maps the homeownership rate of every neighborhood in America.
"Earth" relies on supercomputers to paint an almost real-time picture of the atmosphere's feverish churning.
Alongside every other building in Washington, D.C.
Median incomes have been growing the fastest, however, in a very different part of the country.
A case study in globalization.
Given the differences in housing and living costs across U.S. metros, a single national rate makes little sense.