They are formed in a woman's body before birth and have to be on standby for decades to possibly be fertilized one day. But ...

Using the ROentgen SATellite (ROSAT), astronomers have discovered a new cataclysmic variable system of the polar subtype. The ...

Under the sea ice during the Arctic’s pitch-black polar night, cells power photosynthesis on the lowest light levels ever ...

The north pole of Mars is slowly sinking under the weight of an ice cap that only formed within the past few million years. And, in the process, it's telling us something about what the planet's ...

Ten years of research have revealed new information about the rarely seen, precious time between polar bear mothers and their cubs when they emerge from their dens.

Polar bear mothers in the Arctic generally give birth in early January around the start of the new year. The cubs are born ...

For nearly a decade, researchers have gathered camera footage from outside the dens of female polar bears and their cubs on ...