trees

Hurricane Irene may add kick to fall's colorful leaves.

The interplay between opposing forces that act on trees define their theoretical maximum height.

Evidence is mounting that vines are becoming more abundant in tropical forests of the Americas, raising the possibility of major ecosystem change.

Decline is reverse of earlier boost from warmer temperatures, longer growing season.

Even though plants absorb some greenhouse gas, rising CO2 levels make leaves contribute to global warming.

Forests in the north region are facing increasing threats.

The ancient South American Nasca civilization may have caused its own demise by clear-cutting huge swaths of forest, a new study found.

New devices can be powered by electricity from trees.

Many scientists think early humans walked on their knuckles before evolving the ability to walk upright, but a new study suggests they may have bypassed that step.

Yosemite National Park has lost many of its large trees during the last century, possibly due to a warmer climate, a new study found.