A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not ...

With the Northern Hemisphere well into the winter months, it may seem like temperatures are cold enough already. However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is ...

A powerful polar vortex hit the Big Apple on Sunday, bringing with it inches of snow, bone-chilling temperatures and frigid wind chills that will stick around through the coming week. Forecasters ...

Some say this 160-mile trip down one of North America’s last truly wild river systems rivals the Grand Canyon in terms of scenic wonder.

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not seen ...

It simply means that symptoms have developed quickly and that some sort of medical intervention is needed. A newly diagnosed illness can also be labeled chronic if there is no expectation of a cure; ...