Smoke from hundreds of wildfires in Canada has choked the skies over dozens of northern U.S. states in the Great Lakes and ...

Code Yellow Air Quality or the moderate level for particle pollution is forecast for Thursday and Friday. This may cause health symptoms for groups of people in the unusually sensitive category.

Though wildfire smoke was to credit for poor air quality earlier in the week, Wednesday's alert is due to high-levels of ozone in the air.

Black holes are weird. They’re one of the few things in the universe that manage to be terrifying, fascinating, and […] ...