An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.

With 174 active wildfires burning across Canada, several U.S. states are under air quality alerts due to the traveling smoke from these flames.

The aurora's are back! And may be visible throughout the weekend. The University of Alaska and NOAA track auroras using the Kp-index , a global auroral activity indicator which has a scale from 0 to 9 ...