In this compelling book leading scientists and historians explore the Drake Equation which guides modern astrobiology''s search for life beyond Earth. First used in 1961 as the organising framework for a conference in Green Bank West Virginia it uses seven factors to estimate the number of extraterrestrial civilisations in our galaxy. Using the equation primarily as a heuristic device this engaging text examines the astronomical biological and cultural factors that determine the abundance or rarity of life beyond Earth and provides a thematic history of the search for extraterrestrial life. Logically structured to analyse each of the factors in turn and offering commentary and critique of the equation as a whole contemporary astrobiological research is placed in a historical context. Each factor is explored over two chapters discussing the pre-conference thinking and a modern analysis to enable postgraduates and researchers to better assess the assumptions that guide their research.
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