These pages present a collection of recent papers primarily documenting the nascent science of neutrino geophysics. Most of the papers followed from talks given at 1 Neutrino Sciences 2005: Neutrino Geophysics held at the University of Hawaii in December 2005. Several papers were solicited later in an e?ort to make the collection as comprehensive as possible. Every paper was scrutinized by an external reviewer to assure the quality of scienti?c content. These reviewers are thanked for lending their scienti?c expertise through their many thoughtful comments and suggestions. All authors are commended for providing excellent manuscripts of their important work while maintaining a spirit of cooperative collaboration throughout. Although every attempt was made to produce a thoroughly accurate volume, it is the accepted responsibility of the associate editor for any mistakes, errors, or omissions in the p- sented material. The recommendations, advice, and wisdom of John Learned and Sandip Pakvasa were indispensable in organizing and completing this project. P- duction charges were generously provided by the University of Hawaii. The support of Hawaii Paci?c University, which contributed teaching release time, is gratefully - knowledged. Stephen T. Dye Associate Editor November 28, 2006 Stephen T. Dye is an associate professor of physics at Hawaii Paci?c University and an a?liate to the graduate faculty of the Department of Physics and Astronomy at the University of Hawaii at Manoa. 1 See www. phys. hawaii. edu/~sdye/hnsc. html Earth, Moon, and Planets (2006) 99:1-15 Springer 2006 DOI 10.