Earth’s magnetic north is not static. Like an anchorless buoy pushed by ocean waves, the magnetic field is constantly on the move as liquid iron sloshes around in the planet’s outer core.

The National Weather Service issued winter storm warnings ... The polar vortex of ultra-cold air usually stays penned up around the North Pole, spinning like a top. But sometimes it escapes ...

It's a cold air outbreak that some experts say is happening more frequently, and paradoxically, because of a warming world.

The early morning is expected to start out frosty, but the National Weather Service has projected that the high temperature will hover around 57 degrees. But the Ghost of Christmas Past is full of ...

A polar vortex − a swirling mass of Arctic air typically contained over the North ... the weather for the Philadelphia Eagles-Green Bay Packers game, what to wear The National Weather Service ...

This image provided by European Space Agency shows close-up photos of Mercury's north pole taken by the European-Japanese spacecraft BepiColombo. (European Space Agency via AP) This image provided ...

There won’t be any need for a sled or even a rain coat on Christmas Day in Athens this year. The early morning is expected to ...

An Arctic air mass, sometimes known as a Siberian Express, is expected to move over Michigan by Sunday and will leave ...

It's going to get cold in Tennessee. Meteorologists predict freezing temperatures for much of the state. Here's the latest.

Studies show a fast-warming Arctic is partly to blame for the increasing frequency of the polar vortex extending its icy grip ...

Drivers in North Texas were cautioned to be extremely careful Friday after the region was blasted with wintry precipitation ...