NEW YORK -- It's a tough time to be a tree. For this Earth Day, National Geographic has focused its lens on humanity's relationship with the world's 3 trillion trees and 10 billion acres of forest, ...

Learn more about this tree-dwelling marsupial. They live in mountainous cloud forests at elevations of up to 11,000 feet.

Climb into the clouds to experience the worlds hidden in the treetops above our heads at 7:30 p.m., Tuesday at the Weis Center, 1 Dent Drive, Lewisburg. Tree canopy ecologist Nalini Nadkarni will ...

Ask a nature enthusiast in California to name a famous tree, and they might mention Hyperion, the world’s tallest tree, or General Sherman, the massive giant sequoia in Sequoia National Park. But in ...