Could the clues to ancient alien civilizations be hiding in moon dust?
Most of our experience with the Search for Extraterrestrial Intelligence (SETI) has focused on capturing radio signals that alien species have sent out, whether intentionally or unintentionally. That creates a huge "synchronicity" problem—what if there aren't any alien civilizations broadcasting radio signals now, but there were a billion years ago? The Milky Way is around 13 billion years…
This article explores the possibility that clues to ancient alien civilizations may be hidden in moon dust. Unlike traditional SETI efforts that focus on identifying radio signals from extraterrestrial sources, a new paper proposes looking for physical artifacts created by intelligent beings. The moon is an ideal location for this search as it effectively collects and preserves potential alien remnants over time.
Two types of particles are proposed as candidates: Arkhipov particles, which are unintentional industrial debris that could have been ejected from a Dyson swarm, and Bracewell particles, which are intentional signals sent to other solar systems. The moon's lack of atmosphere, plate tectonics, and water cycle allows any such particles to be preserved for billions of years.
However, these materials must survive the harsh journey through space, including cosmic rays and interstellar dust, as well as the impact of micrometeoroids on the moon's surface. If found, these technological materials could significantly aid in the search for extraterrestrial intelligence.
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