As U.S. shivered through polar vortex, one state was unusually warm
It’s been warmer in Alaska than in three dozen other states. If someone asked you, “Where can I go in the United States to ...
The intriguing phenomenon helping planes slingshot across the Atlantic at 800 mph
The jet stream is like a river of west-to-east winds in the upper atmosphere. Airplanes use it like a highway.