Shape and symmetry help determine where a leaf lands — and if the tree it came from can recoup the leaf’s carbon as it decomposes.

Ever wonder how many trees stand tall in North America's vast boreal forest? A new University of Alberta study has the answer ...

Jeremy Siegel, professor emeritus of finance at University of Pennsylvania’s Wharton School of Business and Wisdom Tree chief ...

Nancy Curtis stands in front of the coast redwood in the front yard of a property she owns in west Olympia. The tree, ...

Building monstrous mounds of mulch — known as mulch volcanoes — around the base of a young tree creates several immediate problems.