After a summer of fasting on land, the bears need to get back to their frozen home to hunt seals and bulk up. But their migration ritual is changing.

The polar vortex hit its peak across much of America on Wednesday, with an icy grip that made Arctic Greenland seem like a toasty vacation spot in comparison. Even Mars has been warmer than North ...

Astronomers have identified sulfur as a potentially crucial indicator in narrowing the search for life on other planets.

The National Weather Service has issued extreme cold warnings for millions of Americans from the Canadian border to Texas.

Martian clouds are almost always made of dry ice, or frozen carbon dioxide. 95% of the planet's atmosphere is CO2.

Arctic daily sea ice extent continued to hover near record daily lows in January, with the ice edge well northward of its long-term average position in most areas. In contrast to the cold conditions ...

NASA researchers have identified geological structures on Mars that are unlike anything found on Earth. From spider-like ...

New images captured by NASA's Curiosity rover show colorful clouds in the sky over Mars. The images were captured by the rover's Mastcam, which NASA's Jet Propulsion Laboratory compared to the rover's ...

Polar bear fur contains a natural oil that prevents ice accumulation Study finds washed fur loses its ice-resistant properties, confirming the Discovery could lead to sustainable anti-icing coatings ...

But, Holst noticed, polar bear fur did not freeze after getting wet. "I was very puzzled," she says. "When they go into the water and out again, why do they not get covered in ice?" The work could ...