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, ...

A pampered tortoise relaxes at a home dedicated for exotic pets that have outlived their owners. A couple poses for photos in ...

One cherry tree blossom is a quiet marvel of spring. Thousands of the cotton-candy pink flowers are a transcendent spectacle.

Working off tips from volunteers, two giant-hunters are tracking down the biggest, tallest, oldest trees in the eastern U.S., from sweetgums on Staten Island to white pines in the Adirondacks. After ...

Forget highways and hiking trails, the best place to spot New England's emerging fall colors is in a treehouse in Connecticut, according to travel magazine National Geographic. The treehouse on the ...