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Astrobiology

Message in a bottle

Extraterrestrial civilizations may find it more efficient to communicate by sending material objects across interstellar distances rather than beams of electromagnetic radiation.

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Figure 1: Is there anybody out there?

JPL/NASA; J. LOMBERG/SPL

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Sullivan, W. Message in a bottle. Nature 431, 27–28 (2004). https://doi.org/10.1038/431027a

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  • DOI: https://doi.org/10.1038/431027a

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