A child's chances of reaching the middle class aren't declining. But whether they get there depends a lot on where they live.
The science of distracted strolling.
A revealing comparison in how we've come to use two very different modes of transportation.
Americans and Europeans are partly to blame for the smog floating over the Pacific, say researchers.
Researchers say a dozen of them are bad enough to cause explosions.
Meet the "Crittercam."
The nano-turbines are so small that hundreds could fit inconspicously on a phone's sleeve.
The blood-feasting insects seem more active in the summer, according to new sleep-killing research.
Researchers studying the shape of our social networks make some startling findings.
A new map showing the carbon footprint for nearly every zip code indicates that suburbs are powerful greenhouse-gas emitters.
Which cities attract the most people, and what kinds of communities are losing them.
In some surprising ways.
Even in an era of cheap, digital communication, most of us are still talking to our neighbors.
Levels of pollution exposure can vary dramatically within a city.
Car culture may not be making us sick. Cities aren't necessarily healthier than suburbs.
By as much as $200 a month.
Scientists have trained algorithms to determine your "urban tribe" from your online photos.
These maps show how shipping vessels are creating loud neighborhoods for oceans and the animals that live there.
States with the toughest driving laws see far fewer traffic fatalities.