Every winter, millions of Americans descend on farms and lots across the country with the express purpose of inspecting, and ultimately choosing from, their local selection of coniferous evergreen ...

Spruce bark beetles don’t just tolerate their host tree’s chemical defenses—they actively reshape them into stronger ...

Australian researchers have discovered a hidden climate superpower of trees. Their bark harbors trillions of microbes that help scrub the air of greenhouse and toxic gases.

Twenty miles southwest of Cornell’s Ithaca campus grows a forest of sweet trees. The tubing at their trunks carry sugary sap awaiting to be transformed into a crowd-pleasing breakfast staple: maple ...

Trees are some of the largest and most widespread organisms on Earth, yet the true number of their species has been an enduring mystery. This lack of knowledge is detrimental to conservation efforts.

Life on Earth relies upon an astonishingly short list of elements. Carbon, hydrogen, and oxygen compose the essential ...

Ask any second grader what you can do with the rings on a tree, and they’ll respond, “Learn the age of the tree!” They’re not wrong, but dendrochronology—the dating of trees based on patterns in their ...

Climate reconstructions based on tree rings have become a major point of contention. In 1998, a climate scientist by the name of Michael Mann had the misfortune of publishing a Northern Hemisphere ...

Needle drop is one of the traits plant scientists at the Christmas Tree Research Center at Dalhousie University are hoping to improve. Flickr user Hannah Gilbert There’s nothing like the site of a ...

Planting trees by the millions has come to be considered one of the main ways of reining in runaway carbon emissions and tackling climate change. But experts say many tree-planting campaigns are based ...

A new dinosaur family tree floated earlier this year isn't quite right, and the old tree, which researchers have accepted as canon for 130 years, isn't much better, a new study finds. Rather, the two ...