A polar day is when the sun does not set and stays above the horizon for an extended period, while a polar night is when the sun never rises above the horizon. These phenomena are ...

and it’s tradition that each overwintering station sends one another a Midwinter’s Day greeting card, just like Christmas cards! During the polar night, the amount of activity in the penguin ...

A strong, stable vortex is like a skater spinning with their arms tucked closely in, holding in an area of cold air over the Arctic. But when there’s a wobble in the rotation, winds in the vortex can ...

During these times, it's referred to as a polar night. The opposite, polar day, occurs when there is 24-hour daylight. A polar day is when the sun does not set and stays above the horizon for an ...