Andrew Richardson, an ecologist at Northern Arizona University, maintains a camera at Hart Prairie, about 8,000 feet above sea level on the west side of the San Francisco Peaks near Flagstaff. While ...

A BBC clip shows Sir David Attenborough’s joyous facial expression as he pokes into the seed pods of an egg ballium plant, a cucumber’s relative. With a woody stem, he nudged into the cucumber, and ...

“Right now, we’re seeing a mix of fall coming in and shifting temperatures, which is causing trees to respond. This back-and-forth hot weather is creating some color changes related to drought and ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

About 20 miles north of Fredericksburg, Enchanted Rock State Natural Area is home to a variety of trees that leaf out with ...

Crimson and gold cascade down the hill, forming a bristling canopy of color to envelop our campus in an inescapable autumnal energy. Mousy, dimmer leaves lay scattered across the pavement. They give ...

You may have noticed recently that some trees around the city are starting to change colors or maybe you've even seen some leaves on the ground. Trees use their leaves (and sometimes their bark) to ...

While out for a walk this weekend, some leaves were really in my face, which got me thinking about why. This is a very leafy time of year, with lots of leaves underfoot, so many that walking in the ...

On a February day, it may seem as if all the trees and shrubs — except for the evergreens or conifers — are leafless. But a walk in the neighborhood, or a local natural area, will reveal that’s not ...