A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges south into the U.S., Europe ...

These type of polar vortex disruptions — stretching or moving entirely out of the North Pole — are happening more frequently, ...

A surveillance camera shakes as a magnitude 6.8 earthquake rocks the northern foothills of the Himalayas near one of Tibet's ...