What is polar vortex and how much snow is expected in US? A winter storm linked to polar vortex disruption has impacted ...

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

What travelers should know as a polar vortex heads towards the United States, including how airlines and hotels are responding, and experts on whether you should cancel your trip.

Snow across the U.S. and a polar vortex in Canada triggered cancellations and delays in Tampa, leaving travelers scrambling ...

Brazilian unmanned aerial vehicle (UAV) specialist Stella Tecnologia conducted its first test flight of a turbine ...

The United States braces for a catastrophic winter storm as empty supermarkets, cancelled flights and emergency declarations ...

A massive winter storm driven by a weakened polar vortex has swept across the United States, killing at least seven people ...

Guilherme Holtz and his family spent 11 hours on a flight from Rio de Janeiro to Toronto and were looking forward to getting ...

Americans stripped supermarket shelves Friday ahead of potentially "catastrophic" winter weather that threatened at least 160 ...

A polar vortex that brought bitterly cold temperatures to much of Canada slammed the country's biggest city with a blizzard ...