The New York Times reported that the National Park Service removed a sign warning about the effects of climate change on the historic Fort Sumter site.

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all scientists agree.

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

As habitats and hosts keep vanishing, the bloodsuckers are turning to us for a free meal.

Scientists have uncovered a surprising mechanism that may explain how Earth cooled dramatically after the age of dinosaurs. Scientists have solved a 66 million-year-old mystery, explaining how Earth shifted from a warm,

The annual gathering of top business leaders and policymakers used to be a center of the global climate movement. Things are much more complicated now.

Belgian biathlete Maya Cloetens is concerned about the future of winter sports in a warming world. Training in Grenoble, France, in the hopes of competing in next month's Winter Olympics in Milan and Cortina,

Research shows Americans are increasingly fretting about disasters — and even the end times. Hiding in a cave might actually protect you.