Biodiversity may help clear pollutants from streams.
Undersea mountains are prime spots to protect ocean life.
The invasive zebra mussel loosens its grip on the Hudson River.
Biologists discover that pandas need old-growth forests to survive.
Why are climbing vines overgrowing tropical forests in the Americas?
A single-celled organism is found to sow and harvest crops of bacteria to sustain its colonies.
Conservation helps, but more must be done to reverse the decline of vertebrate species.
For many vultures, scavenging has become dangerous business.
Use of nitrogen fertilizer is radically impacting Earth's nitrogen cycle.
Roads connect people, but they separate animals.