Maybe you climbed trees as a kid in your backyard. But have you ever wondered what it would be like to climb a 300-foot-tall Douglas fir? At Silver Falls State Park, you now have the opportunity to ...

BOULDER, Colo. — April 26 marks Arbor Day. People around the world celebrate the holiday by planting trees. The holiday started in Nebraska in 1872. More than 1 million plants were reportedly planted ...

Climbers Brian French and Will Koomjian ascend the Brummit fir in Coos County Oregon. It is the National Champion Douglas fir and stands 335 feet tall. Freesolo Photography / Sean O'Connor “Watch out!

Scientists learn how to ascend and study the world’s tallest trees. Tree Climbing School at Dorena offers a demanding 4-day training to teach ecologists and scientists the skills they need to ascend ...

On a hillock on the campus of Xiamen University, a large eucalyptus tree towers above the bamboo grove. A group of men and one woman look up at the maze of silver branches high above their heads. The ...