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Paradi
Exo-Intelligence Atlas
Paradi / Arecibo message
A historic symbolic message, not a practical conversation channel
SETI & Signals / protocol
Arecibo message
The Arecibo message is often invoked as evidence that humans have already 'spoken to the stars.' In practice it was more a demonstration of capability than a realistic near-term dialogue attempt.
SETI & Signals1974
A historic symbolic message, not a practical conversation channel
It is a foundational reference for how people imagine interstellar messaging.
Key points
The message encoded basic scientific and biological information.
Distance and timescale make reply expectations unrealistic.
It still matters as a design precedent.
Reference ledger
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More in this lane
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SETI & Signalssignal
SETI primer
2026
SETI is a research program, not a belief system
The SETI primer is the fastest way to reframe alien communication as a measurement and search problem rather than a rumor problem.
2 referencesOpen dossier
SETI & Signalssignal
SETI Institute overview
2025
Technosignature work is broadening in scope and instrumentation
The SETI overview page explains how radio, optical, and data-commensal searches fit together inside the Institute’s broader program.
2 referencesOpen dossier
SETI & Signalssignal
Allen Telescope Array
2025
A dedicated SETI instrument with wide-field advantages
The ATA is one of the clearest examples of hardware built with SETI as a primary mission rather than as an occasional side use.
2 referencesOpen dossier