A new study shows that polar bears are spending less time on sea ice, leading them to fast longer, become thinner and have fewer cubs.

Texas A&M researchers are part of a time that analyzed how auto exhaust in large cities, especially in China, is linked to air quality and health problems.

Seasonal forecasts for this winter were markedly accurate, with mild conditions in Northern Europe in December and January predicted already in October.

A new study suggests the Western Antarctic Ice Sheet is less stable than researchers once thought. As in the past, its collapse in the future is likely.

Interactive story maps illustrate valuable contributions Maritime salt marshes make to our planet.

The profound threat of future climate change to biodiversity demands that scientists seek ever more effective ways to identify the most vulnerable species, communities, and ecosystems.

The Greenland Ice Sheet is melting faster today than it did only a few years ago. 

At the beginning of each summer, mayfly larvae emerge from bodies of water and shed their skin to become full-fledged mayflies, similar to how caterpillars become butterflies.

Scientists at Caltech and JPL have tied a shift in winter weather patterns in Europe and northern Eurasia to a reduction in air pollution.

Scientists have found a link between a heightened risk of flu and rapid weather swings that have become increasingly common in recent years due to climate change.