A White-crowned Sparrow

A Noisy City Affects Birdsong

As anthropogenic ambient noise increases in urban areas, birds adapt their songs to make themselves heard.
People walk on the Jialing River bed during a drought period on December 12, 2007 in Chongqing Municipality, China.

How Can Cities Keep Water Clean Now and in the Future?

As "megacities" grow in Africa and Asia, assuring residents long-term access to clean water may require a multidisciplinary approach.
42nd Street in Manhattan, New York

Could More Urban Trees Mitigate Runoff and Flooding?

With climate change comes more flooding. As cities confront the risks and potential damages, trees could become even more important.
Birds flying past the windows of a building

Migrating Birds Face an Unexpected Danger: Glass Buildings

Research shows that building collisions take a staggering annual toll on North America's bird population.
Rustam captures the King of Mâzandarân and takes him before the tent of Kay Kâ'ûs.

The Movable Tent Cities of the Ottoman Empire

The most lavish among them were festooned with colorful appliqué and brightened with gilded leather.

To Battle Floods, Cities Revive Their Long-Forgotten Alleyways

Once polluted and abandoned, back alleys have sprouted into flourishing rain gardens.
Barista Coffee Shop Cafe in Portland Oregon

How Portland Became a Hipster Utopia

How did Portland, Oregon become a hipster haven? While other cities declined in the 60s and 70s, Portland looked at what they did and planned the opposite.
Gapstow bridge Central Park, New York City

Where Do City Birds Go for the Winter?

Cities can host surprisingly diverse bird species, apart from the ubiquitous pigeons and sparrows. Where do they go in the winter?
urban bees

The Rise of the City Bee—How Urbanites Built the 21st-Century Apiculture

Urban apiculture is a booming trend. But many metropolitan beekeepers also believe that bees fare better in cities than they do in the countryside.
Drinking at the cafe

When is Public Drinking Cool?

The Wall Street Journal reports that property developers are pushing to allow public drinking on city streets, hoping to encourage a “lively atmosphere.”