The Space Show Present Dr. Steven A. Benner re his new book, “Meet The Neighbors: Life on Mars and How to Find It” Friday, 9-25-26
Quick summary:
This Space Show program featured Dr. Steven Benner discussing the Viking mission’s search for life on Mars in 1976. Dr. Benner explained that despite Viking’s three life detection experiments showing positive results for biological activity, NASA scientists misinterpreted the data due to their lack of understanding of perchlorate oxidants in Martian soil. He described how the community consensus led to the incorrect conclusion that no organics or life were found on Mars, with textbooks later changing the narrative to match the new consensus. Dr. Benner discussed his reanalysis of the Viking gas chromatography mass spectrometry data published in 2000, which showed the scientists had incorrectly concluded there were no organics present. He described his current agnostic life finder (ALF) instrument designed to search for molecules required for Darwinian evolution, which could be sent to Mars to look for polyelectrolyte structures that could indicate life even if it’s different from Earth life. The discussion covered why NASA hasn’t returned to search for life despite the likely presence of microbial life on Mars, with Dr. Benner attributing it to cultural blinders and groupthink within the Mars exploration community rather than malicious intent. This discussion was based on Dr. Benner’s new book, “Meet The Neighbors” Life on Mars and How to Find It.”
Detailed Summary:
Dr. Steven Benner discussed new findings about the Viking mission’s search for life on Mars, mentioning a recent conference where experts revisited the data and chemistry results. He explained that despite ongoing debate, the consensus from the original mission has persisted long after the underlying logic was shown to be incorrect. The conversation also touched on Mars-related symbols like the Mars flag and national anthem, with participants discussing their origins and significance in the space community.
Steven Benner discussed his research on the Viking Mars lander mission, explaining how scientists misinterpreted data from the gas chromatography mass spectrometry instrument in 1976, leading to a conclusion that no organics were found on Mars. He described how he published a paper in 2000 showing the data had been misinterpreted, and how the scientific community has been resistant to reevaluating the findings. Benner noted that NASA’s current approach to life detection experiments remains limited by the lack of understanding about what life might be like on Mars, and he criticized the peer review process in the Mars exploration community for being insufficiently conversant with chemistry.
David Livingston hosted this Space Show featuring Dr. Steven Benner, a chemist and astrobiologist discussing the Viking mission’s search for life on Mars in 1976. Dr. Benner explained that the Viking landers conducted three life-detection experiments, with two of them showing positive results for biological activity, including the formation of organic molecules and the detection of carbon dioxide from radioactive food. The discussion highlighted how these results were initially interpreted as evidence of life, though Dr. Benner noted that no definitive proof was obtained and the experiments required repetition for confirmation.
Steven talked about different definitions of life and explained his work on an agnostic life finder (ALF) instrument designed to detect life on Mars by searching for molecules necessary for Darwinian evolution, particularly polyelectrolytes. He noted that while NASA has successfully delivered rovers to Mars since 1999, extant life detection missions were forbidden due to scientific mistakes in interpreting data from earlier missions like Viking. Steve clarified that the ALF instrument could be miniaturized for space travel and would not require sample return, only needing a ride to Mars where it could analyze water samples for signs of life.
Steve explained how scientists approached the Viking Mars lander experiments, describing how they validated results by heating samples and testing under different conditions. He detailed how the community initially interpreted positive life detection results as false positives due to fear of making incorrect claims, and how they later misinterpreted the gas chromatography mass spectrometry data when organics were detected alongside perchlorates. Steve noted that his 2000 paper correctly identified the misinterpretation of GCMS data, but his findings were dismissed by the scientific community, preventing a proper reevaluation of the life-detection results.
Steven elaborated on his research explaining why a particular piece of equipment couldn’t have detected life on Mars, citing NASA’s discovery of perchlorate in Martian soil and a 2010 paper by Rafael Navarro Gonzalez that interpreted Viking mission results in terms of perchlorate. John Hunt asked about NASA’s policy regarding human missions to Mars and potential planetary protection issues, to which our guest responded that he believes incompetence rather than malice explains the situation, noting that the Mars exploration community lacks expertise in organic chemistry and relies too heavily on outdated textbooks. Benner attributed the ongoing issues to a lack of scientific expertise among decision-makers and referenced a 2019 conference where 60 co-authors discussed approaches to searching for extant life on Mars.
Marshall and Benner discussed the presence of organics on Mars, with Steven explaining how the Viking landers detected organics but faced challenges due to perchlorates in the soil that could ignite at high temperatures. Steven described how the Curiosity mission has been conducting “opportunistic derivatization” to analyze organics without setting them on fire, and noted that meteorite organics have been found on Mars, including benzoic acid as predicted in 2000. When asked about potential life on Mars, Benner outlined what Martian life might look like, suggesting it would need to survive extreme cold, water scarcity, and UV radiation, possibly taking refuge in “special regions” where conditions might be more favorable.
Benner discussed the challenges of detecting sentient life, emphasizing that while Viking missions have accumulated evidence supporting life on Mars, definitive proof remains elusive. He explained that early human habitation on Mars would face significant survival challenges due to the thin atmosphere and dust, requiring extensive technological support similar to living in extreme environments on Earth. The discussion concluded with John Jossy mentioning Pioneer Labs in Emeryville and their development of a microbe, though the transcript ended before he could complete his statement.
The Space Show Wisdom Team discussed recent discoveries about potential life on Mars, including engineered microbes designed to use Martian resources to build the first city on the planet. Seven explained the scientific and cultural implications of finding microbial life on Mars, noting that while it would be a significant scientific discovery, it likely wouldn’t cause the same cultural impact as finding intelligent life. The discussion also touched on planetary protection protocols and the challenges of conducting Mars exploration, with Steve suggesting that NASA’s astrobiology community might need to work outside conventional scientific channels to make progress on the issue.
Steve discussed his book about the failure to explore Martian life and his foundation’s efforts to raise awareness among billionaires like Jeff Bezos and Elon Musk about the potential to discover alien life on Mars. He explained their plan to use Jan Spacek’s International Mars Prospector Rideshare System, which would deploy thousands of impact-hardened penetrators for around $40,000 each, avoiding NASA’s peer review process and soft landing requirements. The discussion touched on ethical concerns about terraforming Mars, with Steve expressing preference for keeping Mars in its natural state for scientific interest while acknowledging the philosophical debate about planetary colonization.
David and Steve discussed the state of science education and its preparation of future generations for critical thinking and scientific leadership. Steve shared his experience with NASA’s Mars exploration efforts and emphasized the importance of teaching students logical argumentation and problem selection skills. The conversation then shifted to potential locations for searching for life beyond Earth, with Benner arguing that Mars represents the most cost-effective and immediate opportunity for discovering extraterrestrial life, while also mentioning other promising locations such as Europa, Enceladus, and Venus.
The discussion centered on the potential discovery of life on Mars and its implications for space exploration and regulatory environments. Benner and David debated whether Elon Musk would be concerned about life discovery affecting his Mars plans, with Benner suggesting it depends on Musk’s legacy goals. Benner expressed personal interest in visiting Mars despite acknowledging the engineering challenges, while defending the use of private funding for space exploration, arguing that such investments drive technological advancement that ultimately benefits society.
David and Benner discussed planetary protection and genetic modification for space travel. Steven explained that while there is some back-and-forth contamination between Earth and Mars, the “geese argument” is relatively persuasive for planetary protection issues. Regarding genetic modification for space, Steven expressed concerns about using such technology, noting that significant biological modifications would be needed before humans could survive on Mars without spacesuits, and questioned whether society could handle the technology responsibly. The discussion also touched on cancer research and its application to both human and animal medicine.
Benner once again mentioned his new book released by Penguin on the 50th anniversary of the Viking landing, which aims to change public perception about life on Mars. He explained his skepticism about AI in chemistry, particularly regarding protein design, arguing that current AI approaches create an “illusion of design” while laboratory evolution methods offer more effective solutions. The discussion concluded with Benner describing his plans to analyze Martian polyelectrolytes to determine if they contain size and shape regular building blocks, which would provide evidence of biological origins.
Today’s Space Show Wisdom Team included Dr. David Livingston (Organizer), John Hunt, Dr. Sherry Bell, Marshall Martin, Dr. Ajay Kothari, Bill Gowan, John Jossy, and our guest of honor Dr. Steven A. Benner.
Special thanks to our sponsors:
American Institute of Aeronautics and Astronautics, Helix Space in Luxembourg, Celestis Memorial Spaceflights, Astrox Corporation, Dr. Haym Benaroya of Rutgers University, The Space Settlement Progress Blog by John Jossy, The Atlantis Project, and Artless Entertainment
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