For a helpful introduction, see James Trefil and Robert M. Hazen, The Sciences: An Integrated Approach, Second Edition / Updated Edition (New York: John Wiley & Sons, Inc., 2000), Chs. 19-25; Roger Lewin, Patterns in Evolution: The New Molecular View (New York: Scientific American Library, 1997); Neil A. Campbell, Biology, Second Edition (Rredwood City, California: The Benjamin/Cummings Publishing Company, Inc., 1987 (1990)). For Teachers’ Files, see Ronald F. Fox, "The Origins of Life: What One Needs to Know," Zygon: Journal of Religion and Science 32.3(September 1997); Ursula Goodenough, "Biology: What One Needs to Know," Zygon: Journal of Religion and Science 31.4(December 1996). See also Francisco J. Ayala, "The Evolution of Life: An Overview," in Evolutionary and Molecular Biology: Scientific Perspectives on Divine Action, ed. Robert John Russell, William R. Stoeger and Francisco J. Ayala (Vatican City State; Berkeley, Calif.: Vatican Observatory Publications; Center for Theology and the Natural Sciences, 1998).