title: Biological evidence against the panspermia theory.
abstract: The following idea is analysed. Given that evolution on Earth seems to have passed through protocellular evolutionary stages of progenotes, this would appear to be incompatible with the panspermia theory because this observation would imply that the infection bringing life to the Earth started in these protocells, for which a low or null infective power is generally expected.
authors.affiliation: Laboratory for Molecular Evolution, Institute of Genetics and Biophysics Adriano Buzzati Traverso, CNR, Via P Castellino 111, 80131 Naples, Napoli, Italy. digiulio@igb.cnr.it
authors.forename: Massimo
authors.initials: M
authors.lastname: Di Giulio
mesh_terms: D001419:Bacteria / Q000235:genetics; D005075:Biological Evolution; D053898:Biosynthetic Pathways / Q000235:genetics; D018559:Exobiology; D008954:Models, Biological; D046588:Nanoarchaeota / Q000235:genetics; D000069497:Origin of Life; D010802:Phylogeny; D012343:RNA, Transfer / Q000235:genetics
chemical_list: D012343:RNA, Transfer