Catherine L. Raven received her doctorate in biology from Montana State University in 1999. She has worked as a park ranger in Glacier National Park (Montana), in North Cascades National Park (Washington) and in Voyageurs National Park (Minnesota). Raven has taught courses online for Montana Tech (part of the University of Montana) in Butte, for Grand Canyon University in Phoenix and for Florida Community College in Jacksonville. She recently authored Forests, part of The Green World series (Chelsea House Publishers, 2006). Address: P.O. Box 87, Emigrant, MT 59027. Internet: DrCatherineRaven@msn.com