I’ve been thinking about the Fermi Paradox again recently, that slightly uncomfortable question about why, if intelligent life is likely in the universe, we don’t seem to have any real evidence of it.

For decades, the search has mostly focused on listening. Radio signals, communication, signs that something out there is trying to make itself known. So far, despite years of searching we have nothing definitive.

This got me wondering whether we’ve been looking for the wrong thing entirely. If you look at what we’re doing as a civilisation, there’s been a noticeable shift.

We’re getting very good at storing information by placing huge amounts of data in tiny physical space. We have materials designed to last for extremely long periods (fused silica, for example), and more recently, even starting to think about storing data off-world

There are already data payloads on the Moon, essentially early attempts at creating long-term archives beyond Earth. In a similar spirit, earlier missions like Pioneer 10 and 11 even carried engraved plaques, simple, durable messages intended to outlast the spacecraft themselves and potentially be understood by any intelligence that might encounter them.

Because we are sending these data stores to the moon, it feels like a subtle but important step, it suggests something quite different about where technology might be heading. Not outward and loud, but inward and durable.

So, I had this idea, and my thought is this:

What if advanced civilisations don’t broadcast signals, those huge technosignatures and radio communications that SETI have been searching for? What if they leave records instead?

Rather than trying to communicate across vast distances, they might create something that simply persists as a kind of long-term archive. If that’s the case, those archives would probably be, small and compact. passive (no need for active power), and extremely durable, designed to last for very long periods, and possibly deliberately placed somewhere stable and discoverable.

If you were looking for a place to store something long-term in our solar system, Mars orbit actually starts to make a lot of sense.  It’s relatively quiet compared to Earth orbit as there is less atmospheric drag, fewer large perturbations, and a simpler gravitational environment overall. There’s also the added point that Mars itself likely had a very different past, thicker atmosphere, liquid water, maybe even early-life conditions. So, it’s not just stable, it’s interesting from a biological perspective.

From an engineering standpoint, there are a couple of obvious candidates. Higher Mars orbit (away from atmospheric effects and lower orbital decay), gravitationally stable regions like the Lagrange points (L4 and L5), where objects can remain relatively stable over long periods.

What would we actually see though? If something like this existed, I doubt it would look like a spacecraft in the way we tend to imagine it. It would probably be small. Passive. Unremarkable at first glance. Maybe the sort of things we’d need to look for are:

• Small objects in unusual but stable orbits
• Occasional bright reflections, glints, where light catches on a surface
• Slightly odd thermal behaviour
• Shapes or edges that don’t quite look natural

In other words, subtle anomalies. Nothing dramatic. Nothing obvious. Just things that don’t quite fit. None of this is especially speculative, it’s just basic orbital mechanics.

One of the most interesting parts of this idea is the possibility that we might already have the data.

We’ve been observing Mars for decades now, with high-resolution imagery, radar data. And thermal measurements, But, all of that work has been focused on the surface, not on systematically looking for small, anomalous objects in orbit. Which means there’s a gap. We might already have the data; we’ve just never really asked this particular question of it.

Is all this actually testable? The answer is yes, and that’s what makes this idea interesting to me.

It’s not just a thought experiment,. It’s something that could be tested, even at a basic level by taking existing Mars datasets and running anomaly detection on them. We can look for anything that or behaves in an unexpected way while filtering out the obvious stuff such as known spacecraft, debris, noise, etc.

Even if nothing turns up, we’d still learn something about what’s there, and what isn’t.

Why does this matter? I hear you ask. Well, If something like this did exist, even just one confirmed example, it would completely change the situation, because it wouldn’t rely on communication, It wouldn’t rely on timing or distance or whether anyone is still “out there”. It would just be… evidence. At that point, the Fermi Paradox wouldn’t really be about silence anymore, it would be more like: Have we simply not recognised what we’re looking at?

As a final thought, I’m not claiming that there are definitely extraterrestrial archives sitting out there in Mars orbit, but it does feel like one of those ideas that sits right on the edge between speculative and testable. And more importantly:

It’s something we haven’t really looked for.

Given how much data we already have, and how our own technology is evolving — it feels like a question that’s at least worth asking properly, because if those kinds of records did exist, we might not even realise we’re looking at them.

Hypothesis (for clarity)

Advanced extraterrestrial civilisations may prioritise long-term information preservation over visible energetic expansion, and may therefore deploy compact, durable archival systems in stable orbital environments, such as Mars orbit or associated gravitationally stable regions, where such artefacts could plausibly persist over extended timescales and be discoverable through systematic analysis of orbital data.

This is a simplified statement of the idea discussed above.

Full Paper

If you’d like to explore the idea in more detail, including the full framework, methodology, and supporting reasoning:

👉 Download my full paper (PDF):
https://malandally.co.uk/wp-content/uploads/2026/06/extraterrestrial-data-preservation-and-the-martian-orbit-hypothesis-2.pdf