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Nature 431, 27-28 (2 September 2004) | doi:10.1038/431027a; Published online 1 September 2004
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Astrobiology: Message in a bottle
Woodruff T. Sullivan, III1
Abstract
Extraterrestrial civilizations may find it more efficient to communicate by sending material objects across interstellar distances rather than beams of electromagnetic radiation.
Are we alone? Although the Search for Extraterrestrial Intelligence (SETI) has yet to detect a signal, the efforts continue because so little of the possible parameter space has been searched so far.
- Woodruff T. Sullivan III is in the Department of Astronomy, University of Washington, Seattle, Washington 98195, USA.
e-mail: Email: woody@astro.washington.edu
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RESEARCH
Inscribed matter as an energy-efficient means of communication with an extraterrestrial civilizationNature Letters to Editor (02 Sep 2004)
