Biodata of the Editors. Acknowledgements. Preface. Microbial biofilms: protective niches in ancient and modern geomicrobiology; J.W. Costerton, P. Stoodley. 1: Biofilm, Biodictyon Biomat - Microbialites, Oolites, Stromatolites - Geophysiology, Global Mechanism, Parahistology; W.E. Krumbein, U. Brehm, A.A. Gorbushina, G. Levit, K.A. Palinska. 2: Development and architecture of complex environmental biofilms - lotic biofilm systems; T.R. Neu, A. Eitner, M. Luz Paj. 3: Ecosystem function, cell micro-cycling and the structure of transient biofilms; D.M. Paterson, R. Perkins, M. Consalvey, G.J.C. Underwood. 4: Structure of marine biofilms - Flat Laminated Mats and Modern Marine Stromatolites; J.F. Stolz. 5: Growth, structure and calcification potential of an artificial cyanobacterial mat; M. Kuhl, T. Fenchel, J. Kazmierczak. 6: Microbial processes forming marine stromatolites - Microbe-Mineral Interactions with a Three-Billion-Year Rock Record; P. Reid, C.D. Dupraz, P.T. Visscher, D.Y. Sumner. 7: Nitrogen cycling in marine cyanobacterial mats; L.J. Stal. 8: Diversity of Cyano-Bacterial Mats; G.A. Zavarzin. 9: Microbial spheres from microbial mats; U. Brehm, W.E. Krumbein, K.A. Palinska. 10: Protozoans and biofilms; H. Arndt, K. Schmidt-Denter, B. Auer, M. Weiterer. 11: Bryozoan morphoprocesses; J. Scholz, G. Levit. 12: Biofilms and macroorganisms; G. Gerdes. 13: "Farming" of microbial mats in the hindgut of echinoids; C. DeRidder, R.L. Brigmon. 14: Extracellular polymers (EPS) and calcification within modern marine stromatolites; A.W. Decho, T. Kawaguchi. 15: The Study of a recent Iron-encrusted biofilm in the marine environment; D.C. Gillan. 16: Microbial endoliths as internal biofilms; S. Golubic, J. Schneider. 17: Epibenthic cyanobacterial communities interacting with sedimentary processes in siliciclastic depositional systems (present and past); N. Noffke. 18: The role of biofilms in the fossilization of non-biomineralized tissues; D.E.G. Briggs. 19: Fossil and subrecent fungal communities in three calcrete series from the devonian of the Canadian rocky mountains, Carboniferous of northern France and Cretaceous of central Italy; A. Preat, K. Kolo, B. Mamet, A.A. Gorbushina, D.C. Gillan. 20: Archean biofilms preserved in the Swaziland supergroup, South Africa; M. M. Walsh, F. Westall. 21: Is the feedback between genetic structure and community structure the computational mechanism of biofilm evolution? D.E. Caldwell. 22: Is there an adequate terminology of biofilms and microbial mats? G. Levit, W.E. Krumbein. 23: Hidden in plain sight - A macroscopic approach to biofilms and other visible manifestations of bacteria in the teaching of field microbiology; B.D. Dyer. 24: Is it possible to quantitatively assess the role of algobacterial films in a water body? N.V. Shadrin. 25: The role of fungal biofilm and networks in the terrestrial calcium carbonate cycle; E.P. Verrecchia, C. Loisy, O. Braissant, A.A. Gorbushina. 26: Past and present biofilm formation in deep fennoscandian shield groundwater; K. Pedersen. 27: Melanin and chromatic changes in black crusts of sandstone monuments; J.M. Valero, J.I. AlavaAlava. 28: Quantification and spatial relationship of microorganisms in sub-aquatic and sub-aerial biofilms; K. Rodenacker, B. Hausner, A.A. Gorbushina. 29: Life on the edge and beyond; J. Seckbach. 30: "Active planetary cover" concept and long-term evolution of planetary climate; Y.M. Svirezhev, A. Block, W. von Bloh. 31: Bacterial biofilms in astrobiology: the Importance of life detection; J. Toporski, A. Steele, D.S. McKay, F. Westall. 32: Fossil biofilms and the search for life on Mars; F. Westall, M.M. Walsh, J. Toporski, A. Steele. 33: Some aspects of studying of fossil mats and biofilms; A.Yu. Rozanov, E.A. Zhegallo, G.T. Ushatinskaya. Index.