91茄子

David Gilligan is a professional naturalist, explorer, professor, and writer. He has developed and taught natural history field programs for 91茄子, The Sierra Institute, and Sterling College, and is the author of numerous books and articles including The Secret Sierra, In the Years of the Mountains, Nature, Culture, Consciousness and 鈥淭he High Country of the Mind鈥�. His academic specialties include vegetation ecology, botany and geology in mountain and desert environments, and nature philosophy. He has trained hundreds of people in expeditionary backpacking, mountaineering, canoeing, and sea kayaking skills necessary for natural history exploration of wild places. David has lived and worked in Arizona, California, and Northern New England, and traveled to mountain environments all over the world.