Find a tall stick. That and one good eye are all the tools you’ll need. With the stick in hand, walk exactly 11 paces from the base of the tree and mark the spot by driving the stick into the ground.

How tall can a tree grow? Does sunlight or water limit the size and photosynthetic capacity of a leaf? Could constraints on leaf growth really determine the height of a tree? These are all questions ...

Scientists have created the first global map of forest height using satellite data. The map will improve estimates of how much carbon is stored in Earth’s trees and how much carbon dioxide they absorb ...

Find out how big this year's Norway spruce is and how it measures up to Rockefeller Center Christmas Trees of past years.

Q: About a third of our homeowners have palm trees which were planted several years ago. These palms are now over the allowable roofline height for trees. We know they cannot be topped without killing ...