They are mostly found on the coasts, according to a new study.
Scientists have taken a new interest in how plant and animal life respond to the city.
It has become a Beantown tradition.
Plastic bag and Styrofoam bans may seem like small potatoes. But local legislation often inspires bigger fixes.
Massachusetts pushes diverse, dense zoning.
The United States is not just as a single national economy but a collection of city and metro economies, and they're growing at starkly different rates.
More and more suburbs are cropping up as hubs.
Data are scarce, but a look at grants from the National Institutes of Health gives us at least a partial picture.
Way to lock up that neck.
How things looked early Monday, before the bulk of the storm made landfall on the U.S. East Coast.
Hint: The really ugly part will be the storm surge.
And that's the "conservative estimate," according to a Johns Hopkins engineer.
As Sandy bears down on the East Coast, some of the biggest cities in America come to a virtual standstill.
The "Frankenstorm" approaches.
The story of how this urban asset was re-purposed holds truths for cities engaged in similar transformations.
Which areas have the most bikers, the most walkers, and the most public transit riders?
Meet the high-paid experts who are pitching our cities and states on how to save money.
Parks, community schools, and other essential elements.
The rail operator's recent success should end the debate over its privatization.