# SETI Scientists Propose Using AI to Search Through Lunar Soil for Alien Dyson Swarm Fragments > Source: > Published: 2026-09-19 15:02:40+00:00 # SETI Scientists Propose Using AI to Search Through Lunar Soil for Alien Dyson Swarm Fragments ## SETI-affiliated researchers propose using AI and advanced microscopy to search lunar regolith for microscopic extraterrestrial technosignatures Researchers affiliated with the SETI Institute have proposed using artificial intelligence to search lunar soil for microscopic fragments of possible extraterrestrial technology. A study led by Lewis J. Pinault was submitted to arXiv on 23 June 2026 and explores whether the Moon could preserve material from technological civilisations that disappeared long before humans began searching for signals. The paper does not report evidence of alien technology. It remains under review by the *International Journal of Astrobiology*, after being submitted to the journal on 10 March and revised and resubmitted on 17 August. The current arXiv version was revised on 18 August. ## Why Lunar Soil Could Preserve Alien Fragments For context, most searches for extraterrestrial intelligence have focused on [radio or laser signals](https://www.ibtimes.co.uk/astronomers-unknowingly-eavesdropped-six-million-stars-alien-search-found-zero-signals-1812813). That method depends on timing. A civilisation may have transmitted for a short period millions or billions of years ago, leaving no active signal for modern instruments to detect. The Moon offers a different type of archive. It has no substantial atmosphere, flowing liquid water or active plate tectonics. Incoming material is therefore not exposed to the same erosion and recycling processes found on Earth. Repeated meteorite impacts churn the upper layers of lunar regolith. This process, known as impact gardening, could bury microscopic particles beneath the surface and help preserve them over long periods. Pinault and co-authors Brian C. Lacki, Ian A. Crawford and Andrew P. V. Siemion modelled how artificial grains might travel through interstellar space, withstand radiation and eventually reach the Earth-Moon system. Their calculations focus on refractory particles with characteristic radii of about 0.3 microns, which could cross kiloparsec-scale distances over roughly 100 million to one billion years. The study examines two broad categories. Arkhipov particles would be non-intentional technogenic debris, including by-products of spacefaring activity or astroengineering. A large structure such as a Dyson swarm could, in theory, generate fragments through collisions or destruction. Bracewell particles would be deliberately dispersed, micron-scale probes. The paper says they could be designed for sensing, logging or communication. Neither category is evidence that extraterrestrial technology exists near the Moon. They describe possible targets for a search that could, at least in principle, be tested. ## AI Would Screen Lunar Regolith Images The practical difficulty is enormous. Researchers would need to distinguish possible artificial grains from ordinary lunar material, meteorite fragments and contamination introduced by spacecraft or laboratory handling. The proposed solution is machine-vision screening. Scanning electron microscopy could generate high-resolution images of lunar particles, while artificial intelligence systems could identify samples with unusual shapes, structures or compositions. The AI would not independently prove that a grain was artificial. It would help researchers decide which images and particles deserved closer examination. The paper points to YOLO-ET, a machine-learning model developed by Pinault and colleagues to detect and classify anthropogenic contaminants and possible extraterrestrial microparticles. Suspicious candidates could then undergo further analysis using techniques including focused ion-beam facilities, spectroscopy and nano-computed tomography, or nano-CT. That distinction matters. A strange-looking grain is not automatically a technosignature. Any candidate would need to be assessed against the Moon's natural geological background, tested for terrestrial contamination and examined with several independent methods. The particles' arrival is another obstacle. The study notes that material near Earth's orbit can be associated with speeds of about 42 kilometres per second because of the Sun's gravitational potential. Impacts at such speeds could vaporise or severely damage incoming particles. The researchers therefore examine whether solar radiation pressure and other effects could create a slower arrival channel. Some particles might reach the Moon at speeds that allow at least part of their structure to survive impact. ## A Null Result Could Still Be Useful The search would not need to produce a discovery to add scientific value. The paper argues that finding no artificial material in one cubic metre of lunar regolith could help constrain how much long-lived technogenic debris has entered interstellar space. According to the study, a null detection could exclude scenarios in which Solar-type stars typically disperse more than approximately 0.10 Earth-mass equivalents of long-lived artificial particulate debris over the history of the galaxy. This is a modelled cumulative output, not material detected in lunar samples. The result would apply primarily to undirected debris. Deliberately targeted particles sent towards the inner Solar System would represent a different scenario and could have a higher probability of detection. The SETI Institute described the research as the first quantitative framework for testing this form of microscopic technosignature. That description comes from the institute and should not be treated as an independently established ranking. Bill Diamond, the organisation's president and chief executive, called the concept 'extraordinarily original and eminently reasonable.'The institute has also pointed to future lunar samples from missions associated with Artemis and Chang'e as possible material for analysis. No current lunar sample-return mission has been specifically designed to search for extraterrestrial technosignatures. For now, the proposal remains a research framework, not a lunar expedition. Most grains would be expected to reflect the Moon's geological history, along with the practical contamination left by human exploration. But a verified anomalous particle would provide direct material evidence that technology had existed beyond Earth, provided it survived the long process of testing still to come. © Copyright IBTimes 2026. All rights reserved.