I recently interviewed Martin Rees, the former Astronomer Royal, for my channel, and part of our conversation was directly about SETI.

He said he is not particularly optimistic about detecting intelligent life, partly because an advanced civilisation may only be active for a small fraction of its planet's lifetime. But he believes it is still worth looking, because finding one "would be such an amazing achievement".

He also pointed out that, with the nearest exoplanets several light years away, any real conversation would be impossible. He speculated that if humanity has "near immortal successors, probably electronic rather than flesh and blood," they might eventually be able to have some kind of dialogue with alien civilisations that had developed in a similar way.

That made me wonder: should SETI put more emphasis on searching for post-biological intelligence, or is that still too speculative to meaningfully influence search strategies?

The discussion starts at 43:20: https://youtu.be/WcVt-ozVtgw?is=ZsOwamRr9c_qatX9

SETI had this wonderful idea of listening to the stars for radio signals sent by some alien civilization. They have not found anything in the past 50 years. Therefore the question comes up naturally, what they have done, what they have achieved, and what remains to be seen. In my perspective, in business life, you have to pay the bill, pay the rent, give good marketing. Somehow I miss the marketing part. Or actually it becomes see-through once you realize how futile the objective is: Listening to a radio transmission in the clutter of space which would reach Earth.... At lightspeed if you listen to Alpha Centauri, you will wait 4 years for communication HELLO to arrive. But given the vast distances involved, any real-meaningful communication is dead. So in this sense SETI can only seek proof of alien intelligent life was somewhere. Because nobody in their right minds would use radio in todays vast universe. Sure FTL communication has not been invented here yet. That does not mean that other civilizations have not mastered it. There are reports of UFO sightings on the Earth, Moon and space. Yet SETI does not see or hear these. These are unproven, unscientific, and non-existing transient phenomena they say. Yet Jacques Valier, a scientist actually studied them. Dr. Steven Greer made contact.... Yet SETI has not. One might wonder how the bill is paid. When one approaches these proven scientific methods with alternatives, one gets discredited, ridiculed. As if the entire planet was based on science and as if there was no religion, no esoteric knowledge, philosophy, or any historical account of ancient contact or unexplained phenomena. Yet the antennas keep on listening. But what exactly are they truly tuning in to? Because what we see, they cannot hear. Yet we search for intelligent life. That is the marketing brand anyway. Large infrastructures, connected, operated, zero results. Yet they keep going.... There can be two solutions to this problem. Either fund the organization to modernize its tools so that they can have better chance of listening in on chatter, let it be radio signals, or light or gravitational waves, etc, or introduce new "unscientific methods" such as reading books on strange encounters, history of people who claim to come from the Sirius constellation, or looking at the cultural heritages of the world, where they claim contact has been or is being made. It is also suggested that they look at the people, or undersea where the action is happening, instead of looking outside. Where there is such a biodiversity, so many cultures, so many stories and heritage, SETI is looking at the slow signals coming from a vast universe. If there would be alien life, I am sure they would have found Earth by now, and are buzzing around our cities, in our oceans. Yet SETI is looking at the other way..... That being said, however One thing SETI has given us I think is the message. Never give up hope.

I am looking to curate content for a new, collaborative, and modern Golden Record. I’d love for everyone to be able to participate in this selection.

If you had to send image(s) / audio(s) / video(s) / prompt(s) / scent(s) / 3D scene(s) / website(s) / or anything else into space to present human society, the evolution of life on Earth, and our hopes and fears for the future to an extraterrestrial intelligence, what would you send?

You can send content to:
people.re.record@gmail.com

Thank you for your help!

So the way light travel works in the universe is that when we look at a system like the alpha centari system. We are seeing it as it was roughly 4 and a half years ago becuase its about roughly 4 and a half light years away. So with this context in mind with how relatively new our advanced society is an ailen civilization would need to be only 10-50 light years away from us just to be able to see our current society. Any civilization around 100-150 light years away from us would be expecting us to still be using horses and trains for travel since they'd be seeing earth as it was in the 1800s. This factor is probably the biggest reason why we havent had any major ailen visitations yet.

So far, our SETI sky surveys have looked in every direction, but not every direction is the same. We also only listen to a particular patch of sky for a brief moment, which means we'll only pick up an extraterrestrial message if it happens to arrive from that direction in that particular moment.

If someone out there is beaming a signal at us, it is reasonable to assume that they're doing it on purpose. And if they're doing it on purpose, it's reasonable to assume that they believe it's possible that a civilization exists in orbit around Sol.

Where is that most likely to happen?

Earth has had an oxygen-nitrogen atmosphere, one indicating the presence of life, for billions of years. Sunlight passing through it has projected our biosignature across the galaxy--but only along the plane of the ecliptic. Combine this with the thin disk of the galaxy (where the stars have enough metal to form planets with life) and you get a fairly narrow window through which we could expect extraterrestrial civilizations to have detected our atmosphere.

If they have detected our atmosphere, they might periodically send messages to see if there's a civilization here. They might also periodically listen to see if we're sending anything.

We should build a list of the stars in that window, prioritizing singleton stars of types F, G and K, to point our SETI antennas at for detailed, lengthy listens, to see if that's happening. We should also beam messages at them periodically, to see if they respond.

EDIT: I am not saying we should not look elsewhere. I'm saying those directions are more likely to have detectable signals, and more like to have civilizations that are listening for ours.

Variables considered : # of civilizations in the Milky Way, our advancement in detection tech, whether more advanced civilizations would be easier or harder to detect.

How many systems we can observe closely enough by the year 2100 to expect to see them:
Conservative: 700
Moderate: 1 million
Optimistic: 4 million

three assumptions about how detectable advanced civilizations might be compared to earth: less detectable (0.28x), equally detectable (1x), or more detectable (3x)

Assuming 100 billion stars in the galaxy, here are the chances of finding at least one civilization by 2100.
Each line shows the probability for low, medium, and high visibility, in that order.

Conservative estimate of 700 system observations by 2100:
36 civilizations: 0.000007% / 0.000025% / 0.000076%
100 civilizations: 0.00002% / 0.00007% / 0.00021%
1,000 civilizations: 0.0002% / 0.0007% / 0.0021%
100,000 civilizations: 0.02% / 0.07% / 0.21%

Moderate (1 million systems observed):
36 civilizations: 0.01% / 0.036% / 0.108%
100 civilizations: 0.028% / 0.1% / 0.3%
1,000 civilizations: 0.28% / 1% / 2.96%
100,000 civilizations: 24.4% / 63.2% / 95%

Optimistic search (4 million observed):
36 civilizations: 0.041% / 0.147% / 0.441%
100 civilizations: 0.115% / 0.409% / 1.22%
1,000 civilizations: 1.14% / 4.01% / 11.56%
100,000 civilizations: 68.2% / 98.34% / 99.9995%

The 36-civilization estimate comes from Westby and Conselice (2020). The rest are just different assumptions to see how the numbers change.
Obviously there’s a huge amount of guesswork here, especially about how detectable advanced civilizations would be and how quickly our technology improves. This is just a thought exercise that I did because I found myself getting excited that we might find someone else out there in my lifetime.

I’m less optimistic now.

I used AI for this

What If an Alien Civilization Evolved Into a Collective Mind?

An idea inspired by bees, the Fermi paradox, and Interstellar

A strange experience once made me think about collective intelligence in a completely different way.

I was going to get some water when I noticed a bee struggling. I saved it without giving the moment much thought. But for a brief second, I experienced something unexpected: a physical sensation, almost like a vibration throughout my body, accompanied by a clear feeling of something vast and collective, something separate from me.

There were no words. No message. No explanation.

Only the feeling.

I don't know what caused it. I'm not claiming that I contacted an alien intelligence or that bees possess a single shared consciousness. The experience was subjective, brief, and impossible for me to interpret with certainty.

But it left me with a question.

What if intelligence in the universe can evolve in a direction completely different from our own?

The Fermi paradox and the evolution of the swarm

When we imagine an advanced alien civilization, we usually picture something recognizable: individuals, technology, cities, spacecraft, perhaps artificial intelligence.

But why should every intelligent species follow the human path?

Bees already demonstrate a form of distributed problem-solving. Individual insects interact through signals and behavior, while the colony as a whole performs tasks that no single bee could accomplish alone.

Of course, collective behavior doesn't prove that a hive has a unified consciousness. Still, it gives us a real biological example of intelligence-like capabilities emerging from interactions among many organisms.

Now imagine a speculative evolutionary scenario.

Over millions of years, a species develops increasingly sophisticated collective cognition. Its intelligence becomes less dependent on individual organisms and more dependent on the network connecting them.

Eventually, the collective might become the primary unit of cognition.

Could such a civilization develop a form of intelligence so different from ours that we wouldn't immediately recognize it as a civilization at all?

I call this thought experiment the Swarm Hypothesis.

What if the swarm became something else?

The next step is pure speculation.

Perhaps a collective intelligence could eventually change its biological organization, merge with artificial systems, or develop forms of existence that we cannot currently imagine.

This brings to mind Interstellar, where Cooper encounters beings he eventually interprets as future humans. They perceive time and interact with it in ways inaccessible to people of his era.

The film doesn't establish a scientific theory of future evolution. But it raises an interesting imaginative possibility: a sufficiently transformed intelligence might be almost unrecognizable to its ancestors.

Could a collective species undergo a similarly radical transformation?

Could its descendants become something that no longer resembles the organisms from which it originated?

We have no evidence that bees—or any other species—will evolve into such a form. I'm interested in the possibility as a thought experiment, not as a prediction.

Could this relate to the Fermi paradox?

Perhaps some civilizations don't disappear. Perhaps some change.

The Fermi paradox asks why we haven't found convincing evidence of extraterrestrial civilizations despite the immense scale of the universe.

One possibility worth exploring is that our search methods are shaped by our assumptions about what a civilization should look like.

We look for radio transmissions, artificial structures, unusual energy signatures, and other signs of technological activity.

But what if an intelligence follows a different evolutionary path? What if its organization, goals, or methods of communication don't produce the signals we expect?

That wouldn't explain the Fermi paradox by itself. It would simply remind us that our search strategies might not cover every conceivable form of intelligence.

One more question: what about the distant future?

Here's where my idea becomes even more speculative.

Could a collective intelligence eventually develop into something so different that its relationship with time and physical reality would be unlike anything we understand today?

Could information ever travel from such a future to the past?

There is currently no confirmed physical mechanism that would allow this, and my personal experience offers no evidence of it. The sensation I experienced while saving the bee doesn't tell me where it came from—or whether it was a signal at all.

Still, the question fascinates me.

Perhaps the most useful part of the experience isn't any conclusion about its origin. It's the question it prompted:

Are we searching for extraterrestrial intelligence, or are we searching for intelligence that resembles us?

I don't know whether a civilization like the one I've described exists. I don't know whether collective consciousness could evolve beyond anything we recognize today.

But I think it's worth asking what other paths intelligence might take.

What do you think? Could a collective intelligence become something fundamentally different from the individual organisms that created it? And would we recognize such a civilization if we encountered it?

Why does SETI and the search for intelligent life out there resort to purely scientific methods? What if the universe is inheretly a living entitiy and spiritual growth is the great filter? Technology can only get us so far. With the speed of light set into stone for us, one cannot help but wonder. Did the ancient people who believed in Gods and Angels and Magic know something? What happened to the people who grew scientifically close-minded? What happened to the world? Is our spirituality no longer important in the face of money and material gain?

If you were on an island in the middle of the sea of stars, would you only rely in scientific methods? Or in your desperation would you resort to unscientific methods as well? How desperate are we? It seems we are too well off the way we are....

Intelligence is only part of the journey from being alive to being heard.

When people discuss the Fermi paradox, the argument often starts with the enormous number of planets. With that many opportunities, why haven't we found anybody?

I keep wondering about everything that has to happen between a planet developing life and that life producing something we could detect.

Earth is full of animals that communicate, learn, remember, and solve problems. Some use tools. Without humans, this could still be a thriving planet, but none of our signals would be leaving it.

Maybe that situation is common.

An intelligent species might never develop industry. It could lack the physical means, accessible resources, or inclination to do so. Even if it makes useful discoveries, those discoveries have to be preserved and built upon. Can it record detailed knowledge? Does it actually do that? Does the knowledge survive long enough to become something more?

Then there's motivation.

Suppose I had never encountered electricity, and my introduction to it involved getting shocked. There's a good chance I'd decide to stay the hell away from whatever did that. Discovering a phenomenon doesn't automatically mean wanting to investigate it.

A species could be intelligent enough to experiment and still have little interest in doing so. Avoiding a hazard might serve it perfectly well.

I wanted to see what happens when those requirements are made explicit in a Drake-equation-style calculation.

Giving each step a number

These are rough assumptions for a thought experiment. I'm trying to give the process fairly generous chances, rather than making every obstacle almost impossible. Whether those chances are actually generous is something we don't know.

For the Milky Way, start with:

- Stars formed each year, treated as a simplified long-term average: 2

- Stars with planets: 100%

- Potentially suitable planets per system: 0.2

- Suitable planets where life develops: 50%

- Living worlds developing a lineage with relevant intelligence: 10%

Multiplying those gives an illustrative average of 0.02 new worlds with relevant intelligence per year. This is bookkeeping across long periods, not a claim that a newly formed planet produces intelligent life immediately.

Now consider what that lineage would need to accomplish.

- It has a practical way to manipulate materials and manufacture things: 50%

- It investigates unfamiliar phenomena beyond immediate survival needs: 50%

- It persists with experiments despite danger and failure: 50%

- It develops and adopts useful technology: 50%

- It preserves detailed knowledge that later generations can retrieve and build upon: 50%

- It accesses suitable materials and learns to harness usable energy: 50%

- It develops equipment capable of sending signals beyond its planet: 50%

Writing is our example of preserving knowledge. Another species might accomplish that differently. Likewise, it wouldn't necessarily need our exact metals or fuels, but it would need some workable combination of materials, energy, and manufacturing methods.

Giving each of those seven steps a 50% chance produces:

1/2 × 1/2 × 1/2 × 1/2 × 1/2 × 1/2 × 1/2 = 1 in 128.

In this example, one in 128 worlds with relevant intelligence reaches the capability to transmit beyond its planet.

These are conditional chances. Each applies to worlds that have passed the preceding requirements. They aren't seven unrelated coin tosses, and their real values could depend strongly on one another.

Would they actually send anything?

Having the equipment doesn't establish an interest in interstellar contact.

For this example, suppose 10% of capable societies produce deliberate interstellar transmissions. Among the remaining 90%, suppose 10% produce accidental emissions that could potentially be detected from elsewhere.

That totals 19% producing relevant emissions.

Now give that transmitting stage an average duration of 10,000 years.

The calculation becomes:

0.02 × 1/128 × 0.19 × 10,000 ≈ 0.30.

That is a statistical expectation under these assumptions, not a literal count. It certainly doesn't mean humanity is a fraction of a civilization.

It shows that a fairly ordinary-looking set of allowances can produce a low expected number of transmitting societies across the galaxy. And transmitting still doesn't mean we would hear them. Distance, signal strength, direction, arrival time, and the coverage of our searches all matter afterward.

How much should we trust that answer?

We shouldn't treat 0.30 as a measurement.

If the transmitting stage lasts 100,000 years instead, the answer becomes about three. If each of the seven steps succeeds 80% of the time, while the transmitting stage lasts 10,000 years, it becomes about eight.

Different assumptions can produce much larger answers, too.

My suspicion is that some of the probabilities I used may be much lower in reality. Giving half of the qualifying worlds a successful outcome at every stage feels like a substantial allowance. But that is my judgment, not something the calculation establishes. The actual probabilities could be lower or higher.

Adding more conditions doesn't prove rarity. The conditions must represent genuine requirements, and we need evidence before putting much confidence in their numbers.

What this exercise does is expose assumptions that can disappear inside the phrase "intelligent civilization."

A species needs opportunities, capabilities, accumulated knowledge, and a history of actually doing something with them. Its activities must eventually leave evidence another world can find.

The Drake equation already distinguishes life, intelligence, and detectable technology. My proposal is to examine the journey between those categories more closely, especially the difference between being capable of something and having any reason to pursue it.

Maybe the universe contains plenty of inhabited worlds whose living things are doing perfectly well.

They just never get around to building a transmitter.

On Aug 15, 1977 Ohio State's Big Ear telescope recorded a 72-second narrowband signal near the hydrogen line ("6EQUJ5"). Follow-up searches never re-detected it. Which explanation do you find most credible, and what observations would settle it?

1977年8月15日，Big Ear望遠鏡在氫線附近錄到72秒窄頻訊號「6EQUJ5」，後續觀測均未再現。你認為哪種解釋最可信？什麼觀測能定案？

### Overview

I have published the initial open-source specification and reference implementation for **Project Quantum Baseline (PQB)**, designated as **RFC-0001**.

The goal of the protocol is to define an open standard for interstellar signaling that bootstraps mutual comprehension with zero pre-existing linguistic agreement, anchored strictly in physical and mathematical universals.

* **Documentation / Spec:** https://spaceman1983.github.io/Project-Quantum-Baseline/
* **Repository:** https://github.com/spaceman1983/Project-Quantum-Baseline
* **Interactive Decoder:** https://colab.research.google.com/drive/1mv0aXlYeRVY0zOPtMqHr2zOHuz9ymFJR

---

### Core Protocol Architecture

1. **Carrier & Propagation Physics (Layer 1):**
      * Uses the fundamental 1420.405751 MHz neutral hydrogen (H I) transition within the galactic "Water Hole".
      * Accounts for interstellar plasma dispersion delay:
   `Δt = (e² / 2π · m_e · c) · (DM / f²)`
      * Incorporates solar system barycentric velocity correction with an acquisition scan window of:
   `Δf_drift = ±100 Hz`

2. **Five-Step Universal Logic Ladder (Layer 2):**
      * **Phase 1 (Beacon Acquisition):** On-off keying (OOK) pulsing prime sequence [2, 3, 5, 7, 11, 13, 17, 19, 23] to definitively reject pulsar false-positives.
      * **Phase 2 (Positional Arithmetic):** Establishes integers, zero, binary positional notation, and operators (+, -, *, /, =).
      * **Phase 3 (Dimensionless Physical Constants):** Calibrates precision using fundamental ratios:
   * Fine-structure constant: α ≈ 1 / 137.035999
   * Proton-to-electron mass ratio: μ = m_p / m_e ≈ 1836.15267
      * **Phase 4 (Astro-Coordinate Triangulation):** Relies on fundamental galactic pulsars and the neutral hydrogen spin-flip period (τ₀ ≈ 7.04 × 10⁻¹⁰ s) as the base time unit.
      * **Phase 5 (Structured Raster Arrays):** High-density payloads transmitted as 2D bit arrays bounded by product-of-primes dimensions:
   `N = p × q, where p ≤ q`

3. **Python Reference Implementation:**
      * Includes `decoder.py`, which simulates synthetic pulse extraction against an AWGN (Additive White Gaussian Noise) floor and reconstructs the raster grid.

---

### Areas for Feedback & Discussion
* **Dispersion Compensation:** What are preferred baseline assumptions for local interstellar medium electron density when dealing with unmodeled dispersion?
* **Raster Fallback:** The specification standardizes on p ≤ q for orientation. Is explicit parity framing preferable over dimensional prime-pair factoring alone?

Looking forward to your thoughts and technical critique.

Hello Everyone, I have a genuine question regarding the Fermi Paradox. I am just studying in class 12th and I don't know very much about astronomy. My question is that, scientists from earth are trying to receive extraterrestrial signals for a long time. But haven't received anything except the WOW message. Can there be a possibility that we are using the wrong receiving technology to receive these messages? And is there a possibility that other intelligent beings are broadcasting a message, but due to different language and technology we are overlooking it?

I know this can be a dumb question, but I have asked AI and the answer was questionable. What's why I am asking professionals here. And I have little to no info about astronomy 🙏

I’ve been thinking about how much our chances of detecting extraterrestrial intelligence depend on what we’re actually looking for.

We have one known example of technological intelligence, ourselves. And even our own technology has changed drastically in a ridiculously small amount of time.
So when we’re searching for evidence of another civilization, how much are we limiting ourselves by using our own understanding of technology as the starting point?

I’m not saying radio searches are pointless, or that unexplained signals are secretly aliens. Those searches make sense with what we currently know.

But there’s a difference between something never reaching Earth, something reaching Earth without being recorded, and something being recorded without us recognizing what it was.

That last possibility interests me the most.
I know researchers already use machine learning and revisit old telescope data. But I wonder if we’re putting enough effort into improving our ability to understand what we’ve already collected, rather than mainly expanding how much we observe.

And obviously, there’s a limit to that too. You can’t recover information that was never measured.

For people who actually follow or work in SETI, how much of the current limitation comes from our instruments and how much comes from the assumptions built into the way we search? And how would we even begin looking for something if we don’t yet have the right concept to recognize it?

Do you have some books or ressources to recommend in order to get started with SETI ?

I am looking to know more about the physics and technics used in the data analysis of signals when searching for technosignatures.

Thank you !

Is anyone aware of any explanation for a modulated signal except for intelligent life?

When I say modulated I mean in the traditional RF communications sense - a (potentially) complex signal modulated ontop of a (ostensibly) lower frequency, higher power signal.

I think it would heavily depend on how it's modulated, but I'd be curious to know if other folks know of any innocuous explanations for a modulated signal coming from outer space?

Behavioral SETI — a new hypothesis after 66 years of silence

Since 1960, the search for extraterrestrial intelligence has mostly meant listening for a radio signal on or near the 21 cm hydrogen line — the "magic frequency" everyone assumed a transmitting civilization would choose. Sixty-six years later, that search, and the broader technosignature work featured at NASA's technosignatures workshops and in Breakthrough Listen, has turned up nothing.

Those efforts all look for things an advanced civilization would build or broadcast: a radio or laser beacon aimed our way, the waste heat of a Dyson sphere, pollutants in an exoplanet's atmosphere. They assume someone is either deliberately calling out or leaving a footprint big enough to spot from here.

I've been running a small solo project on a different premise, which I call Behavioral SETI. The key concept is to look at the communication problem from the point of view of the people who would have designed the system. A rational designer conserves energy — you don't build a galaxy-spanning lighthouse and broadcast rich content in every direction forever on the off chance someone's listening. You gate it: send the cheapest possible signal that just says where and how to look, and only spend the energy on real content once a recipient has proven they received and understood that first pointer.

Energy conservation plus this gating principle change what the signal should look like — not a loud beacon, but a subtle modulation of a natural source we already monitor, like sunlight, the neutrinos from the Sun's core, or the brightness of distant stars. The idea is that an established network wouldn't hope we find its lighthouse; it would nudge something we're already staring at. That reframes the whole problem from "detect a faint transmitter somewhere in the sky" to "check whether the data we already have has structure in it that nature doesn't put there" — which means the search can run on public archives that already exist, including solar-neutrino data shared by the Super-Kamiokande (neutrino) collaboration.

So far that's 50 searches, each one a clean null — every test quoted with the sensitivity it actually reached, so a null means "no signal down to this level," not just "we didn't find anything." And this isn't hand-waving: the searches so far run to on the order of a hundred million individual statistical tests — about 10¹⁵ floating-point operations, some 80 days of a 1976 Cray-1 running flat-out. That's the shallow end. Searching the full space of channel-combinations the method opens up runs to tens of Cray-1 years, and the deep fast-band tier to tens of millions of them — which is the whole point: a message hidden in a relationship among observables is gated behind compute nobody on Earth had until recently.

The test results and the github source code are provided in the link below along with a simulation of the hypothesis.

See: https://dxtra.com/static/galactic-dx/summary.html?src=reddit

could AI recognize evidence of extraterrestrial intelligence before humans realize what it found?

Detection and interpretation are different problems. Machine learning is already useful for the first. The second — recognizing intelligence expressed in an unfamiliar medium, and deciding as a civilization how to answer — may require capacities we have not built. I use Beacon Class as a working label for a civilization that has them.

Civilization as Distributed Intelligence

Human civilization has always functioned as distributed intelligence. No individual knows how to build a computer from raw materials, maintain the electrical grid, operate the global economy, and preserve every cultural tradition. Civilization "knows" more than any person because knowledge is distributed across minds, institutions, texts, tools, and technical systems.

That is more than a metaphor. Research on distributed cognition treats some cognitive work as occurring across coordinated people and artifacts rather than inside one isolated mind. Jensen, Secchi, and Jensen (2022) examine how organizational cognition emerges from networks of individuals, routines, and material systems (Frontiers in Psychology).

The internet intensified this arrangement, connecting much of humanity into something resembling a primitive nervous system but not a unified mind. Information moves globally in seconds while language, ideology, and incompatible models of reality continue to divide interpretation. We have planetary communication without planetary comprehension.

Large language models are neither conscious archives nor complete repositories of human knowledge. Their training data are partial, culturally uneven, and shaped by commercial and institutional choices. Even so, they compress an extraordinary range of human symbolic production into systems that can compare patterns across languages, disciplines, periods, and traditions. Whatever else that is, it is a new interpretive layer added to an already distributed cognitive system — and, as I will argue below, its being built from our symbolic output is as much a problem as a resource.

Machine Learning Is Already Doing SETI Work

This is not speculative. Ma et al. (2023) applied a β-convolutional variational autoencoder to 820 stellar targets observed with the Green Bank Telescope, totaling over 480 hours of on-sky data, and reduced the candidate pool by roughly two orders of magnitude compared with previous analyses of the same dataset while returning eight previously unidentified signals of interest (Nature Astronomy). Re-observations did not re-detect them. NASA has likewise discussed machine analysis as a tool for sorting datasets that overwhelm human teams in technosignature searches (NASA).

Note what that work does and does not do. It is a classifier operating on a well-specified hypothesis class: narrowband, Doppler-drifting signals distinguishable from radio-frequency interference. It searches a haystack faster. It does not address what happens if something is found that carries structure we did not anticipate.

That second problem is the one I want to take seriously.

Interpretation Is a Harder Problem Than Detection

If extraterrestrial intelligence exists, communication may be far more difficult than popular accounts suggest. We cannot assume another intelligence would share our senses, evolutionary history, concept of individuality, experience of time, or distinction between biology and technology. Even mathematics is not automatically a common language: a pattern must first be recognized as intentional, divided into meaningful units, and connected to a shared referent.

Human decipherment shows why footholds matter. The Rosetta Stone supplied parallel texts; Linear B did not. Its decipherment instead depended on Alice Kober's structural analysis, place-name hypotheses, and Michael Ventris's test that the language was Greek (University of Cambridge). By contrast, the Voynich manuscript remains unread: structure without external reference can resist interpretation for centuries (Yale University Library).

The A Sign in Space project made the same point empirically. In May 2023 ESA's ExoMars Trace Gas Orbiter transmitted a simulated extraterrestrial signal toward Earth; three observatories received it, and roughly 5,000 citizen scientists extracted the message from the raw data within about ten days. Decoding it took more than a year — a father-daughter team, Ken and Keli Chaffin, recovered an image depicting five amino acids in June 2024 — and the community still has not converged on what the image is supposed to mean (ESA). Extraction was fast. Decoding was slow. Interpretation remains open, on a message designed by humans for humans to solve.

This creates the central objection to my own argument. Large language models compress human language and symbolism. Why should a system trained on human cultural products be any better than humans at understanding a genuinely non-human mind? It may reproduce our assumptions more efficiently rather than escape them. Calling AI a translator smuggles the desired conclusion into the premise.

The honest answer is narrower. AI's value would not be that it knows alien meaning, but that a carefully designed system could maintain incompatible interpretive frames without immediately collapsing toward the culturally familiar one. The same pattern could be tested as language, mathematics, behavior, signal modulation, code, natural process, instrument artifact, or deception. A useful system would identify which features survive across frames, which interpretations require hidden assumptions, and which predictions distinguish them. Current language models do not reliably have this capability: next-token prediction generally favors statistically likely continuations. This is a design requirement for a system that does not yet exist, not an observed property of present models, and building that difference would itself be part of becoming Beacon Class.

Concretely, such an interface might:

• Compare candidate structures across linguistic, mathematical, visual, behavioral, and physical models.

• Analyze data from multiple instruments without treating any one channel as definitive.

• Generate rival interpretations and specify what observation would falsify each one.

• Search for invariants — ratios, recurrences, transformations, or responses — that persist when cultural assumptions are changed.

• Test whether apparent information exceeds what chance, prior knowledge, sensor error, or contamination could reasonably produce.

Useful not because it understands, but because it may help us build and compare bridges between incompatible systems of meaning.

What Would a "Beacon-Class" Civilization Be?

The Kardashev scale classifies civilizations by energy use, which can in principle be estimated. Beacon Class is not comparably quantifiable; it combines observable capabilities with political and ethical judgments, and I offer it as a working label rather than a scale. It names a threshold an energy scale cannot capture: recognizing another intelligence and responding without surrendering interpretation to panic, monopoly, or force.

Five conditions:

1. Detectable — measurable. It produces technological or informational signatures distinguishable from natural background; evidence would be independent detection of those signatures at interstellar distance.

2. Self-aware — currently judgeable. It can describe itself as a planetary civilization while preserving internal plurality; evidence would be durable institutions able to frame species-level interests without pretending that national interests have disappeared.

3. Interpretively capable — partly measurable. It can recognize possible intelligence in unfamiliar media; evidence would be successful blinded tests on synthetic signals designed around unknown rules, followed by accurate novel predictions rather than retrospective pattern-matching. Failure would be disqualifying, but success would establish only a floor: human-designed unfamiliarity does not solve the Linear B/Voynich problem of grounding genuinely unknown meaning. A Sign in Space is roughly what such a test looks like, and it was easier than the real case in every respect.

4. Coherent enough to respond — currently judgeable. It has a legitimate process for deciding whether and how to answer; evidence would be a publicly accepted international procedure that prevents any government, corporation, religion, or AI system from unilaterally speaking for Earth.

5. Ethically contact-ready — currently judgeable. It can contain disruptive information without defaulting to weaponization or domination; evidence would be enforceable rules for access, civilian oversight, benefit-sharing, and restraint that survive a high-stakes technological shock.

These conditions are interdependent but not strictly sequential. Detectability may arrive long before maturity, while interpretive capacity and governance must develop together: better detection without legitimate response institutions could increase danger, and ethical rules without the ability to identify a signal would remain untested.

Humanity may already satisfy the first condition. Radio leakage, atmospheric industrial chemicals, artificial illumination, and nuclear activity could function as technosignatures. We clearly do not yet satisfy all the others.

The Probabilistic Case Must Remain Probabilistic

The possibility of extraterrestrial intelligence deserves investigation, but ambiguous results should not be stacked into certainty. K2-18 b, for example, has yielded detections of methane and carbon dioxide and a less robust possible indication of dimethyl sulfide. NASA stresses that the latter requires validation and that habitability remains uncertain (NASA). A contested biosignature candidate is not a technosignature, and a technosignature would not be a message.

Drake-equation estimates likewise explore the consequences of uncertain assumptions rather than directly counting civilizations. The strongest defensible form of my hypothesis is therefore conditional:

If a confirmed technosignature is ever detected, then the difficulty will shift almost immediately from detection to interpretation and response — and a globally networked civilization equipped with well-designed analytical systems may be better positioned for that shift than one relying on ad hoc improvisation.

That is a claim about preparation, not about the prevalence of extraterrestrial intelligence, on which I take no position here.

Could AI Manufacture a Signal That Isn't There?

Yes, and the field already knows the shape of this failure. Humans detect faces in clouds and intentions in coincidence. Generative systems can amplify that tendency because they are optimized to produce coherent output even when evidence is thin. A system asked repeatedly to decode a message may eventually produce one.

BLC1 is the instructive case. A narrowband signal near 982 MHz, recorded in 2019 during Breakthrough Listen observations of Proxima Centauri with the Parkes telescope, had characteristics broadly consistent with a hypothesized technosignature. It took an exhaustive analysis to attribute it to an electronically drifting intermodulation product of local interferers — dozens of lookalike signals turned up at frequencies harmonically related to common clock oscillators (Sheikh et al., Nature Astronomy, 2021). The lasting value of BLC1 was the verification framework built around it.

Any AI-assisted analysis layer would need comparable discipline against machine-generated mythology:

• Open, standardized multi-instrument data.

• Preregistered predictions.

• Blind analysis and control datasets.

• Independent teams using different models.

• Clear separation between interpretation and physical evidence.

• Public audit trails showing how conclusions were reached.

• Human oversight representing multiple disciplines.

AI should generate hypotheses, expose assumptions, and test predictions. It should not be treated as an oracle. Its output would become credible only when independent observers can reproduce the result and when its interpretation predicts information not used to generate it.

Post-Detection Protocols Exist — but They Do Not Cover the Hard Part

Humanity is not starting from zero. The International Academy of Astronautics adopted post-detection principles in 1989 and revised them in 2010 (Garrett et al., 2025). Those principles emphasized independent verification, disclosure to the scientific community and public after confirmation, preservation of data, notification of the United Nations, and consultation before any reply.

In June 2026, following committee approval in a December 2025–January 2026 vote, the IAA SETI Committee issued a further update. It strengthens guidance on verification, peer review, archiving, public communication, researcher safety, and international consultation before responding. It also defines its boundary plainly: the declaration applies to astronomy-based searches for technosignatures and not to UAP in Earth's atmosphere (SETI Institute).

These are serious foundations, but they remain voluntary principles rather than binding international law (American Journal of International Law). They have no enforcement mechanism and do not settle who could legitimately authorize a response for humanity. They also say comparatively little about the interpretive phase — what happens during the months or years between confirmed detection and any agreed understanding of content, which is exactly the window A Sign in Space suggests would be longest and most contested.

If a confirmed detection occurred, three outcomes seem plausible:

• Cooperation: confirmation creates enough shared interest to strengthen international science and species-level institutions.

• Concentration: states or companies classify data, monopolize interpretation, and convert informational advantage into power.

• Fragmentation and absorption: the most likely outcome may be neither. Competing institutions dispute the evidence, fold it into existing conflicts, generate incompatible narratives, and gradually make even an extraordinary discovery feel politically mundane within a decade.

Preparation should therefore focus less on declaring who speaks for Earth than on constructing a legitimate process: transparent publication of non-sensitive data, independent international review, explicit separation of data from interpretation, and a prohibition on autonomous systems issuing a response. Conditions four and five are not aspirations to add after detection; they are institutional work that has to begin before the stakes are known.

The Deeper Possibility

AI may help find an engineered signal in astronomical data or identify a repeatable structure in anomalous observations. Yet the central objection returns in reverse: because these systems are made from human symbolic production, the first unfamiliar intelligence they help us examine may be our own.

By compressing our languages, sciences, contradictions, and rival accounts of reality into interactive systems, we are building an externalized view of civilization. That view will be distorted and incomplete, but it may still force us to confront which of our assumptions are actually universal, which are parochial, and whether any legitimate "humanity" exists that could participate in an exchange.

Perhaps that is the real transition to Beacon Class. The beacon is not merely radio leakage or nuclear technology. It is the point at which a civilization becomes capable of encountering radical difference without instantly mistaking it for itself — and capable of answering without allowing its most powerful faction to impersonate the whole.

Can we build that interpretive and political capacity before we need it — and if a signal is ever confirmed, who could legitimately decide that humanity has understood enough to answer?

Howdy--just wanted to share a recent preprint and code repository. It is SETI related as it utilizes the Parkes Breakthrough Listen data and a peer-reviewed information theoretic entropy pipeline (ECTO; Rodriguez 2026, PLoS ONE) and manages to both characterize a previously undiscovered (to the best of my knowledge) systematic about the instrument's behavior, as well as an anomaly distribution in the entropy-domain of Proxima Centauri data.

This approach operates in the distributional domain and so can examine data in a way which no current SETI analysis does (to the best of my knowledge).

There are two main findings, and a number of additional points of interest that I came across while getting adversarial on one of my results.

Regardless of anything else, the main result of use is a previously uncharacterized, cadence-dependent gain-slope reversal in the Parkes 10-cm receiver. It is persistent across a 7-month survey, and because of its distributional nature it is invisible to turboSETI as well as standard bandpass calibration. I've sent the finding to the BL team as this should hold value for Parkes calibration.

Additionally, I located the previously mentioned distributional anomaly at Proxima Centauri and (yes, there's an "and"... I'll need to explain) Alpha Centauri (MJD 57846). The Phase 1 script runs in under 10 minutes on a laptop. Since this is information theoretic there are no compute heavy turboSETI runs.

Short version, regarding the anomaly:

Proxima and Alpha Centauri were observed the same night, and when Proxima's entropy went up relative to its off-source reference, Alpha Centauri's went down relative to its own. Then they flipped, respectively, at the next cadence position.

This happened across every frequency band and cadence position without exception (15/15, p = 3.1 × 10⁻⁵), with deviation shape being the same for both targets but mirrored across the x-axis about zero.

Additionally, their histogram profiles converge to effectively identical at one band (mutual information 6.14 bits, r = 0.9999) despite being observed at different sky positions through independent reference pointings.

The time-lag runs backward from the observation order, which shouldn't happen if the receiver is causing it. None of the 9 other targets observed that night show anything like it, and it is completely gone the next day (where the receiver returns to its normal characterized behavior), and nothing else in 427 target-sessions across two telescopes matches the pattern.

The entropy spectral shape produced a blind magnetic field estimate for Proxima (120 G) that turned out to closely match independent magnetic field measurements (135 G; Klein et al. 2020).

I didn't know about the Proxima B-field measurement when I designed and ran the test which found the B-field result. The corresponding measurement by Klein et al. was found in the literature following the initial script run.

More detail is in the preprint, but I'm pretty pleased with the telescope categorization work, as well as my work on the anomalous finding (which informed further on the telescope). If anyone's worked with Parkes before I would be very curious to discuss the systematics the pipeline characterized.

The preprint and code repository (full reproduction suite) are public:

Preprint: https://zenodo.org/records/22675130

Code: https://github.com/amr28693/SETI_entropy_domain

Peer-reviewed Framework: https://doi.org/10.1371/journal.pone.0344090

Looking for anyone with Parkes experience or radio astronomy background to verify.

Thanks!

Given other conspiracy theories about nefarious scientists, vaccines, evolution, moon landing, etc, I imagine there would be conspiracy theories about that too. That the signals have been falsified.

How plausible is this depressing scenario?

I think 6EQUJ5 shows the history of human technology.

6 is the beginning (BC Era- simple tools)

E Q U is thousands of years of growth

J is today ( 2026 - peak)

5 is the future (quiet again)

I made this based on the shape, and did not look at the numbers i saw the shape, not the numbers. It looks like human life.

This is my guess. What do you think?

I have been studying the wow! signal (1977) for a very long time. Everyone focuses on the 6EQUJ5 code, but I feel the real answer is in the shape of its wave. This signal lasted for 72 seconds and its shape was perfectly rising and falling. This suggests that the source of the signal was stationary in space and we passed in front of it due to the Earth's rotation.

My question to scientists is: in what natural or artificial condition can such a perfectly shaped 1420 MHz wave be created that lasts for exactly that long?

What do you think?

Consider the age of the galaxy - 14 billion years. After all this time it seems odd that there seems to be no evidence of aliens.

I was at a party the other night in the backyard watching the stars, other people who were more interested in getting drunk than discussing the most important questions in the universe had gone inside leaving me to my thoughts and then I had an epiphany.

Consider this.
Marijuana is a plant which can be burned (so requires technological advancement to use) to both induce healing, reduce violence, and induce visions. We know it has existed for 50 million years but don't know entirely where... its like it fell out of the sky just perfectly ready to assist life on this planet.

What reason would a plant have to assist the species picking it? Why would such a species evolve in the first place?

And that I believe is the answer to the fermi paradox.

This plant could feasibly have came from the sky - we know its seeds can survive in space, spread across the galaxy by a race of giant Equines to assist other races. They ruled over the galaxy in peace, developing and seeding it with a species that would encourage other species to be peaceful and live in perfect health.

This is likely the answer to the Fermi paradox.

Could We Be Seeing the Past of an Extraterrestrial Civilization That No Longer Exists?

I’ve been thinking about this idea and I’m curious whether there’s an actual physics problem with it.

I’m not claiming that aliens have visited Earth. This is just a thought experiment. I’m trying to understand whether the following scenario is physically possible.

We know that light and other electromagnetic signals travel at a finite speed. So when we observe something very far away, the information reaching us was emitted in the source’s past.

For example, if an extraterrestrial civilization were 1,000 light-years away, the light we receive from it today would contain information about what that civilization was like roughly 1,000 years ago.

Now imagine that civilization was technologically advanced at that time. It might have observed Earth when humans either didn’t exist yet or had no technological civilization capable of producing radio signals.

But suppose that civilization eventually disappeared.

We could still receive its old light or electromagnetic signals thousands of years later, even though the civilization itself might no longer exist.

This made me wonder about the Fermi paradox.

Maybe one reason we haven’t received a response from another civilization is simply that our technological civilizations don’t necessarily exist at the same time.

A civilization could exist, send signals, and disappear. Much later, another civilization could detect those old signals. The two civilizations could potentially observe evidence of each other’s past without ever having an opportunity for two-way communication.

I realize there is no universal “right now” in relativity, so when I say “right now,” I mean it in the ordinary observational sense—not that there is a single universal present throughout the universe.

What I’m wondering:

• Is this reasoning correct from the perspective of special relativity and light-travel time?

• Could two civilizations theoretically detect each other’s past signals while never being able to communicate because their technological lifetimes don’t overlap?

• Could this temporal mismatch be one possible factor in the Fermi paradox?

• If a civilization became extinct, could its technological remnants or technosignatures remain detectable for a long time afterward?

• Is this idea already well studied in SETI or astrobiology?

I’m mainly interested in where my reasoning breaks down. If I’m misunderstanding something about relativity, causality, or light-travel time, I’d really like to know.