When Robert Clements first moved to Vermont more than 50 years ago, he didn't know an ash tree from a hole in the ground.

Yet another invasive species is creeping through South Carolina, this one attacking ash trees. The emerald ash borer has ...

As Australian cities heat up and dry out, street trees are emerging as frontline defenders of urban livability.

to the Bodhi tree where Buddha attained enlightenment; and Yggdrasill, the ash tree that supports the world in Norse mythology. “Trees have always been important across cultures,” says Provan.