autumn

Forests become a veritable garden in the fall, presenting a riot of color in national forests as well as on the streets where we live. But what exactly is going on in those leaves? How – and why – do leaves change color, and why is there so much variety? It boils down to chemistry.

One of the greatest natural events in the world is starting to change — change colors that is. The brilliant colors on the leaves of millions of trees are about to make you look up in awe and the U.S. Forest Service wants folks to get outside and experience it this Fall. This year the Forest Service...