Tree Ring Research

Have you ever stopped to think about the gigantic storehouse of information contained within trees?

Quite frankly, it's mind-boggling ... and to some, a life's passion.

Henri D. Grissino-Mayer is one such person. He studies tree rings - the science of dendrochronology.

"My goal is to make available as much information about dendrochronology as I can possibly find on the Internet, from the basics of tree-ring dating, to reference and bibliographic information, to products and supplies, to books, and more!," he writes on his web site.

"My mission was born from an overwhelming need among dendrochronologists for a permanent repository of information that was free to the public, easily understandable, and as comprehensive as humanly possible."

Since 1996 he's created quite a collection. You can check it out here.