By Alec Fernandes
Could the Moon be hiding trash from an extraterrestrial civilization? A team of SETI-affiliated researchers thinks it's worth checking. In a new study under peer review, scientists led by Lewis Pinault of the SETI Institute and Birkbeck College propose that advanced alien societies—even ones long extinct—would inevitably shed debris as their technology wore down, the same way satellites lose material in orbit today. Over cosmic timescales, some of those microscopic fragments could have drifted across the galaxy and landed on the Moon, turning its surface into an unlikely archive of extraterrestrial engineering.
The team has given these hypothetical specks a name: "Arkhipov particles," a nod to Ukrainian scientist Alexey Arkhipov, who floated a similar idea back in the 1990s. Other researchers in the field call the approach creative and scientifically legitimate, even as they caution it's a long shot.
The proposed next step involves a lunar mission sifting through about a cubic meter of soil and screening for metallic or otherwise artificial material. The project's biggest challenge would be separating true alien debris from the huge heap of junk humans have also ejected into space.
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