Catherine RavenCatherine Raven is a former national park ranger at Glacier, Mount Rainier, North Cascades, Voyageurs, and Yellowstone national parks. She earned a PhD in biology from Montana State University, holds degrees in zoology and botany from the University f Montana, and is a member of American Mensa and Sigma Xi. Her natural history essays have appeared in American Scientist, Journal of American Mensa, and Montana Magazine. You can find her in Fox's valley tugging tumbleweeds from the sloughs. Read More Read Less