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giant mars astrobiology, several methods of study, separate internal from external environment, self- replicating proteins, oil or gas fields, light telescopes, implications, self sustain, unlikely earth contaminants, oxidize sulfates, dna analysis, obscured by later life, complex inter- relationships, fatty acids with ester linkages, site selection, reprogrammable, linda janke, various macromolecules, desiccation, habitable temperatures, confused older taxonomy, fullerines, planetary science, analyze rocks, magnetite, probability of occurrence, catalysts, many disciplines, biomarkers, desert varnish, carbon compounds, concept maps, water, grow, hypervelocity impact studies, geochemical records, desert varnish, random processes, precursors to life, anaerobic, microbial mats, mexico salt works, develop selection criteria, temperate environments, prepared by joe novak 5 8 99, deep drillings, astrobiology, signature chemical compounds, meteorite information, twelve groups, life in extreme environments, water artifacts, theoretical models, classification scheme, composite map, planetary history, high production rates, more ssable, biomass of mats, manganese & iron oxides w clay matrix, ameba or paramecium- like, radio telescopes, photosynthetic upper layers, variety of organic molecules, habitability limits, protein for pores, transfer substances, analysis on earth, 3.5 billion years old, proteases, planets, defined three dimensional structure, cyano- bacteria, orbiting telescopes, topologic features, hot springs, evolution of physical environment, planetary craters, extraterrestrial samples, some thioesters, how did life begin & evolve?, much time, stars, fossilization process, orbiters, gene sequencing, etc., cell types, low power requirements, heterotrophic lower layers, survive in space, polycyiclle aromatic hydrocarbons, lipids, .5 to 1.5 billion years, 13-15 billion years, molecular structure & function, fossil minerals , many younger biospheres, sensors, millimeters to centimeters thick, topographic effects, uv light, final analysis for life, biomarkers, earth, pamspermia, archaebacterial ecology, fatty acids with ether linkages, energy source, deep sea and deep ice cores, symbiosis, haley, time, high or low temperatures -0 c. or 50 c., varying chair lengths, fossil species, computer simulated, go back 4 billion years, need to integrate knowledge, evolutionary characteristics, instrumentation, life requirements, big bang, c60 to c360, observatories, history of rocks, complex structure, temp. extremes, multidisciplinary, varying side groups, control costs, high tolerance, ocean vents, extended occlusion of sunlight, high miniaturization, high salinity, space craft sterilization, spectro- photometers, three major questions, ken neilsen, high reliability, similar under microscope, enclosing membrane, sublimation of carbon compounds, desert life, organic chemistry, galaxies, biomarker, deserts, ted bunch and others, complexity theory, robotic landers, geochemists, environmental history, k t boundary, survival on mars, varying efficiencies, return samples, oxygen, proteins, meteorites, protocells, analytic instruments, high or low ph, fossil record, does life exist elsewhere?, mass extinctions, atmospheric chemists, big mind, many species, 3he and 4he, chemical effects, competition, what is the future of life?, aerobic, early heterotrophs, molecular phylogenetics, ancient species, produced biologically, mars, early earth environments, survival at high temps., siromatotites, environmental requirements