The polar vortex is a massive, swirling band of cold air that normally traps frigid temperatures around the Arctic. However, ...

Another large fire exacerbated by climate change is threatening the health of Chicagoans. Government officials issued an air ...

The fires began earlier this week in the province of Manitoba. The smoke will bring hazy skies and could potentially affect ...

For this all-citizen and private polar launch, it will be the first time that the quartet will be in space, and it will be the first time any human has done a 90-degree circularized orbit ...

Northerly winds on Saturday will bring Chicago smoke particles, which should stay mainly aloft, resulting in a milky sky and, at times, poor air quality. A big summer-like warm-up is expected ...