Experts think they've solved the mystery of what has been killing sea turtles in the Indian Ocean at the peak of their nesting season.

The rare chiru, once extensively poached for its prized wool, appears to be increasing its population thanks to conservation efforts by Chinese officials and Tibetan locals.

Volcanic blasts in what is now Washington State spewed steam and billowed ash in amounts that dwarf the eruption of Mount St. Helens in 1980, research shows.

Officials in three states have said they will to allow hunting—which could reduce wolf numbers back to dire levels—if the creatures lose their protected status.

Storms last week killed all but 1 of the 18 endangered whooping cranes that had recently completed a journey from Wisconsin to Florida, escorted by ultralight aircraft.

This Groundhog Day's prediction of an early spring may be cold comfort to hibernators. Global warming is disrupting long winter's naps, sometimes fatally.

If life as we know it exists on the red planet, it would have to be deeper under the surface than current probes are able to detect, a European team concludes.

Global warming is here, it's human caused, and it will go on for centuries, an international panel of scientists declared in a report released today.

A resurgence of bugs in streams contaminated by a sulfur mine shows that cleanup efforts are restoring water quality and creating a healthy ecosystem.

Though derided by critics as alarmist, the IPCC—which releases a major report Friday—may actually be too conservative, says a study of the panel's recent forecasts.

The tiny marine plants that make up the foundation of the food chain are directly affected by warming oceans, a recent study found.

Within a few decades, pollution could erase thousand-year-old stone carvings at one of Mexico's most important archaeological sites, a new study shows

An upwelling of mud that has killed at least 13 and may leave thousands homeless was started by exploratory drilling, scientists say.

Rebel troops who killed and ate two critically endangered mountain gorillas in Central Africa earlier this month have agreed to end the slaughter, conservationists say.

An underground trove of fossils suggests humans, not climate change, led to the demise of the continent's ancient large animals, scientists report.