Around 8:30am on January 18, a small clutch of parents wearing thick coats, scarves and gloves were milling around the entrance to West Philadelphia’s Penn Alexander School, eyeing each other warily.

In the first-ever study on the characteristics of urbanization in large cities around the world, researchers at the University of Hong Kong analyzed cities' urban built-up areas (BUAs) expansion, ...

This is a preview. Log in through your library . Abstract Urbanization exposes wildlife to unfamiliar environments, including novel structures and food sources. Adapting to such anthropogenic ...

As cities physically expanded worldwide between 1970 and 2010, the population in those cities became less dense, according to a new study. As cities physically expanded worldwide between 1970 and 2010 ...

Of course, part of the number is fictitious. With the discrimination between rural and urban communities at 2500, a ‘country’ community of 2490 becomes a ‘city’ on adding ten new inhabitants without ...

Today, the world’s urban population grew by close to 200,000 people. It will do the same tomorrow, and the next day, and so on into the future. Two-thirds of humanity will live in cities by 2050. We ...

KIAMBU, Kenya — Turn into Tatu City on the outskirts of Kenya’s capital, Nairobi, and it feels like entering a different world. Even the country’s most reckless drivers are transformed, slowing to a ...

How is St. Louis--not in a good way--like Paris, Athens, Mexico City and Calcutta? From Europe to India to Central America to the Midwest, all of these cities suffer similar urban ...