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Invisible Planets and Messages from Other Civilizations
The piece discusses distant, advanced civilizations possibly beaming encoded messages to Earth via natural radio emissions or hydrogen and hydroxyl wavelengths. It cites Dr. Carl Sagan and Dr. Livermore Hafner on coding schemes and the vast cosmic distances, noting the slow two‑way exchanges and human limits in recognizing or replying.
MENTIONED IN THIS ARTICLE
New York
Carl Sagan
Harvard University
Ta‘briandsland
Pacific
Dr. Lyverett M. Hafner
University of Rochester
Earth
Hafner