The U.S. Environmental Protection Agency says that sea ice's light color causes it to reflect more light into space. This maintains Earth's energy balance and keeps the polar regions cool. If the ...

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 ...

At the edge of the Arctic in northern Canada, the annual migration of polar bears draws tourists, photographers, and ...