Colorado’s popular recreation areas were hit especially hard by the epidemic. Out of about 4.1 million acres of pine forests ...

If you were to slice into one of those logs, you’d see a lovely blue stain seeping through the yellow wood. It’s a telltale sign of a tree that was killed by mountain pine beetles, and it has ...

“The beetles do make a difference,” says Hans Cornelissen at Vrije Universiteit Amsterdam in the Netherlands. Researchers already knew that, by killing trees, insect infestations in forests ...