Editor’s note: This story has been updated to clarify the type of trees affected by Phanerochaete velutina. A species of wood-eating fungus didn’t need a brain to pass a cognitive test with flying ...

Clouds form when water vapor – an invisible gas in the atmosphere – sticks to tiny floating particles, such as dust, and turns into liquid water droplets or ice crystals. In a newly published study, ...

On Friday, July 18, Flagstaff residents will have a unique opportunity to experience a nationally produced PBS documentary episode filmed in their own backyard -- and focused on the river that defines ...