Classical arguments for skepticism regarding the Search for ExtraTerrestrial Intelligence (SETI) are critically examined. It is suggested that the emerging class of “phase transition” astrobiological models can simultaneously account for all available astrophysical and biological evidence, explain several unresolved puzzle in Earth sciences, and rationally justify current and future SETI projects. In particular, the hypothesis of Annis that local gamma-ray bursts drive the astrobiological phase transition deserves to be further quantitatively elucidated. Some epistemological and ethical ramifications of such a model are briefly discussed. Download the PDF
Milan M. Ćirković Ph.D. is a fellow of the IEET, Assistant Professor of Physics at the University of Novi Sad in Serbia, and Senior Research Associate at the Astronomical Observatory of Belgrade, Yugoslavia.