The concentration of carbon dioxide in the Earth's atmosphere is fast approaching levels not seen for millions of years. At 400 parts per million (p.p.m.), the planet is fast approaching the point of no return for avoiding dangerous climate change.
Courtney Humphries takes a look at recent federal investment in research on the complex interrelationship between human settlements and the natural environment.
Scientists are studying whether the stresses of living in urban environments increases the risks of developing mental health disorders. Global urbanization is making the question an urgent one, writes Alison Abbott.
Evolutionary biologist David Sloan Wilson is trying to understand how natural selection works at various levels. His new lab: the city of Binghamton, New York.
A major mountaintop mining permit is likely to be rejected after an environmental review found "unacceptable" impacts on water quality and wildlife. This would be the first major rebuke to the mining practice, and could foreshadow its end.
The latest issue of <em>Nature</em> looks at the implications of an increasingly urban world on the field of science, and the field's impact on cities.
An Italian enthusiast examning maps of the region around his home using two new Google mapping products discovers the remains of an ancient Roman Villa.
