For additional discussions on this topic, see de Duve (1987) and Orgel (1998). These are based largely on a review paper by Joyce (2002). We outlined the essential steps for the origin of life (see p. (2006) and Schopf (2006).įor a discussion of early photosynthesis, see Olson (2006).Ĭhapters 3 and 4 from Knoll (2003) are a good presentation of what life may have been like on a young planet. Various views on the fossil evidence for early cellular life are presented in Brasier et al. Fossil Evidence and Comparisons of Modern Organisms Suggest That Life Evolved Soon after Earth Was Hospitable Īdditional information can be found in Chapter 3 of Life on a Young Planet: The First Three Billion Years of Evolution on Earth, by Andrew Knoll (2003). įor more on the planetological approach, see. More information on the geological approach using gneiss and zircon dating is available at. Estimates of the Age of the Earth Place a Lower Boundary on When Life Began Nave at “Fossils, Rocks and Time,” by Lucy Edwards and John Pojeta at “The Earth through Time,” by Harold L. Other good web resources about determining the age of rocks and fossils are “Clocks in the Rocks,” by C.R. When Did Life Begin on Earth? Radioisotope DatingĪn excellent web resource is available from the United States Geological Survey at, including a chapter on radiometric dating at. In the chapter introduction, we provide a definition of life, which is based upon what is referred to as the “NASA definition of life.” For more information on this and other definitions of life, see Joyce (1994), Luisi (1998), Fenchel (2002), and Rasmussen et al. See Knoll (2003), Fenchel (2002), Gesteland and Atkins (1993), Gesteland et al. There are a number of good general references on the origin of life. Leaving the RNA World Required the Evolution of the Translation System and the Genetic Code The Chicken-and-Egg Problem Solved: RNA Can Serve a Dual Role as Information Carrier and Catalyst Self-Replication Is Necessary for EvolutionĬompartmentalization Facilitates Self-Organization and Accelerated Evolution Many Molecules Required for Life Can Be Created by Chemical or Physical MeansĬhemical Reactions Can “Evolve” to Produce Complicated Molecules and Primitive Metabolism Estimates of the Age of the Earth Place a Lower Boundary on When Life Beganįossil Evidence and Comparisons of Modern Organisms Suggest That Life Evolved Soon after Earth Was Hospitable
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