A biocontainment facility designed to protect Earth from potentially hazardous biotic contaminants from space should be part of a planned NASA base on the moon, a policy paper maintains.
"Humanity is entering a new era of space exploration, but our planetary protection strategies have not kept pace with the risks associated with returning extraterrestrial samples to Earth," said paper co-author Frederick I. Moxley, Director of Strategic Threat Analysis and Research Laboratories, an Idaho-based consultancy.
"The proposed facility would essentially act as a firewall between Earth and any potentially hazardous live organisms that could accompany returning future space missions.," said Moxley, whose co-author is Anthony Ricciardi, a James McGill Professor of Biology and the Director of the Bieler School of Environment at McGill University.
In their paper, published in the journal Ambio, Moxley and Ricciardi argue that all extraterrestrial material collected from the moon, Mars or beyond should first be transported to a secure lunar-based quarantine and research facility, rather than directly to Earth.
The authors recommend that all incoming extraterrestrial samples be handled exclusively through advanced robotic systems within the lunar facility, minimizing the possibility of human exposure and accidental release.
While the existence of extraterrestrial life remains unconfirmed, Moxley and Ricciardi caution that the introduction of any novel form of life to the Earth's biosphere would pose unpredictable ecological consequences. The history of invasive species on Earth serves as a warning, they said.
"Decades of research on invasive species have demonstrated how an organism introduced to the wrong place at the wrong time can spread uncontrollably with potentially devastating and irreversible long-term impacts on ecosystems," said Ricciardi, an expert on biological invasions. "This research justifies a strong precautionary approach against introductions of extraterrestrial origin."
The paper arrives amid growing international and commercial competition in space exploration, with government agencies and private aerospace companies rapidly expanding missions beyond Earth's orbit. According to the authors, this increasingly crowded and competitive environment makes rigorous biosafety standards more urgent than ever.
Among the concerns raised in the study are catastrophic scenarios involving the crash or malfunction of a spacecraft carrying contaminated material or astronauts exposed to extraterrestrial environments. The scientists argue that no existing facility on Earth can guarantee absolute containment, eradication or control of an unknown alien micro-organism in the event of an accident.
The authors conclude that while the search for life beyond Earth could become one of humanity's greatest scientific achievements, the risks associated with that search must be addressed proactively.
"The moon," they argue, "may become humanity's first line of biological defence."
About the study
"Protecting Earth from extraterrestrial contamination: The case for a lunar biocontainment facility," by Frederick I. Moxley and Anthony Ricciardi, was published in Ambio.
