What exactly is 'wind chill'? It brings these hidden dangers
Eyes up! The Northern Lights may put on an encore performance Tuesday night
Photos: Bright auroras light up the sky in Canada and around the world
When is the cold too cold? How extreme cold warnings are issued
A very strong solar storm just hit Earth! Expect bright auroras tonight!
The freezing level is the invisible line that controls winter
ISS astronauts return to Earth early due to illness of crew member
What is the polar vortex? How it’s responsible for dangerous cold
Massive iceberg A-23A turns bright blue as it finally dies off
85% of California's gold undiscovered: Heavy snow can make it more accessible
Ready for sunsets after 5 p.m.? They’re on the way in Ontario
