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Extraterrestrial Intelligence: Where is Everybody?

Published online by Cambridge University Press:  04 August 2017

John A. Ball
John A. Ball*
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 USA

Abstract

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Why are we unaware of extraterrestrial intelligence?

Type
Section VII. The Fermi Paradox and Alternative Search Strategies
Information
Symposium - International Astronomical Union , Volume 112: The Search for Extraterrestrial Life: Recent Developments , 1985 , pp. 483 - 486
Copyright
Copyright © Reidel 1985 

References

Ball, J.A., “The Zoo Hypothesis,” Icarus 19: 347 (1973).Google Scholar
Kuiper, T.B.H., and Morris, M., “Searching for Extraterrestrial Civilizations,” Science 196: 616 (1977).CrossRefGoogle Scholar
Morrison, P., Billingham, J., and Wolfe, J., eds., The Search for Extraterrestrial Intelligence: SETI, National Aeronautics and Space Administration, NASA SP-419, Washington (1977).Google Scholar