Abstract：
:We critically investigate some evolutionary aspects of the famous Drake equation, which is usually presented as the central guide for research on extraterrestrial intelligence. It is shown that the Drake equation tacitly relies on unverified assumptions on both the physicochemical history of our galaxy and the properties of advanced intelligent communities. In this manner, the conventional approach fails to take into account various evolutionary processes forming prerequisites for quantification of the Drake equation parameters. The importance of recent results of Lineweaver and collaborators on chemical build-up of inhabitable planets for the search for extraterrestrial intelligence is emphasized. Two important evolutionary effects are briefly discussed, and the resolution of the difficulties within the context of the phase-transition astrobiological models is sketched.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Cirković MMdoi
10.1089/153110704323175160keywords:
subject
Has Abstractpub_date
2004-07-01 00:00:00pages
225-31issue
2eissn
1531-1074issn
1557-8070journal_volume
4pub_type
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