The Michael Shermer Show

The Original Alien Craze: When People Believed in Martians

December 20, 2025

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  • The turn-of-the-century belief in intelligent Martians, fueled by Percival Lowell's observations of 'canali' and amplified by mass media, served a cultural need by providing a utopian, moral counterpoint to the perceived social decay and scientific undermining of traditional religion on Earth. 
  • The popular conception of Martians as advanced, peaceful beings who could answer humanity's deepest philosophical questions reflects a persistent human impulse to seek external, superior entities (sky gods or aliens) to solve collective problems like conflict and suffering. 
  • Even though Percival Lowell's specific theory about canal-building Martians was scientifically incorrect, the resulting 'alien craze' had a profoundly positive, constructive legacy by inspiring future generations of scientists and science fiction writers, including Robert H. Goddard and Carl Sagan. 
  • The human tendency to fill in missing or ambiguous visual data with familiar patterns, as seen in Percival Lowell's observations of Martian canals and modern blurry UAP photos, highlights the role of human psychology in shaping scientific belief. 
  • The historical fascination with extraterrestrial life, exemplified by the Martian craze and Nikola Tesla's claims, mirrors contemporary public interest in UFOs and techno-signatures, demonstrating a persistent human desire to believe in a grander cosmic scheme. 
  • The comparison between historical figures like Tesla and modern innovators like Elon Musk reveals a recurring tension between visionary genius and the practical necessity of business acumen for realizing large-scale scientific or technological ambitions. 

Segments

Martian Craze and Religious Impulse
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(00:00:50)
  • Key Takeaway: The belief in Martians provided a secular, supernatural replacement for traditional Christian belief, offering guardian angels and moral exemplars as science eroded faith.
  • Summary: As science undermined traditional Christian belief, Percival Lowell’s Martians offered people essentially supernatural beings next door who could act as guardian angels. Depictions often showed Martians with wings, looking down to save Earth. This provided a comforting, inspirational vision, leading some pastors to sermonize about Martians as beings humanity should emulate.
Guest Introduction and Book Inspiration
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(00:02:06)
  • Key Takeaway: David Baron’s book, The Martians, stems from the astonishing realization that creatures common in 1960s sci-fi were widely accepted as scientific fact in the early 1900s.
  • Summary: David Baron, author of The Martians, was inspired by his childhood exposure to Martian characters in cartoons and sitcoms. His research revealed that what is now science fiction was once considered scientific fact around the turn of the 20th century. The seven-year research process involved analyzing thousands of newspaper clippings and archival documents covering psychology, culture, and religion.
Schiaparelli’s Canali and Lowell’s Theory
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(00:09:56)
  • Key Takeaway: The Martian craze was ignited not just by the mistranslation of Schiaparelli’s ‘canali’ (channels) to ‘canals,’ but by Percival Lowell’s subsequent theory that these were artificial irrigation systems on a dying planet.
  • Summary: The initial observation of lines on Mars by Schiaparelli in 1877 led to the Italian word ‘canali,’ which was mistranslated into English as ‘canals.’ While this caused initial jokes, the craze truly began in 1894 when Percival Lowell, inspired by Camille Flammarion, established the Lowell Observatory. Lowell theorized these lines were irrigation canals built by Martians to move meltwater from the poles to their cities to survive on the dying planet.
Lowell’s Bias and Evidence Handling
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(00:17:39)
  • Key Takeaway: Percival Lowell, driven by the need to make a significant discovery, exhibited confirmation bias by selectively collecting evidence supporting his canal theory while dismissing contradictory findings from other astronomers.
  • Summary: Lowell, feeling pressure from his esteemed family pedigree to achieve intellectual importance, became psychologically invested in his canal theory being true. When critics argued the lines were optical illusions, Lowell countered by developing new photographic techniques to prove their existence, often attributing critics’ failures to inferior eyesight or equipment. He also argued that the visible lines were not water, but the seasonal greening of vegetation alongside the canals.
Evolutionary Projections on Martian Appearance
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(00:29:58)
  • Key Takeaway: The stereotypical image of aliens—tall, skinny, big-headed, and bald—was derived from applying the contemporary, teleological view of evolution to Mars’s specific environmental conditions.
  • Summary: The Martians were often imagined as what humans would become in the future, given Mars’s older age. H.G. Wells’s original Martians were depicted as giant brains in sacks, reflecting the idea that intelligence would supersede physicality. Their large eyes were attributed to less daylight on Mars, their height to lower gravity, and their large chests to a thinner atmosphere.
Tesla’s Radio Signal Announcement
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(00:52:24)
  • Key Takeaway: Nikola Tesla dramatically escalated the Martian craze at the dawn of the 20th century by announcing on New Year’s Eve 1900 that he had detected rhythmic, triplet signals from Mars using his experimental radio receiver in Colorado Springs.
  • Summary: Tesla, famous for AC power, was experimenting with wireless signal transmission in Colorado Springs in 1899. He detected faint, rhythmic clicks that he attributed to Martians attempting radio communication, as no terrestrial stations existed. Tesla used a letter intended for a global New Year’s Eve publication to announce this finding, propelling the Martian belief into a cultural phenomenon across advertising, stage shows, and music.
Martians as Utopian Saviors
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(00:57:24)
  • Key Takeaway: The public embraced the Martian utopia because it offered a vision of unified, efficient global cooperation—necessary for their imagined irrigation system—providing comfort during the unstable, unequal Gilded Age and filling the void left by declining traditional religious faith.
  • Summary: The Gilded Age was marked by poverty and social unrest, making the idea of a unified Martian civilization working together appealing. Lowell’s theory suggested Martians achieved survival through total cooperation, contrasting sharply with Earth’s conflicts. Furthermore, Martians were seen as potential saviors, answering theological questions about the meaning of life and the soul, effectively becoming ‘sky gods’ in an increasingly secular world.
Legacy of Inspiration and Modern Projections
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(00:51:32)
  • Key Takeaway: Despite Lowell’s theory being wrong, the excitement it generated inspired key figures in space exploration and science fiction, demonstrating that even incorrect scientific speculation can yield positive, constructive outcomes.
  • Summary: Lowell’s vision inspired children like Hugo Gernsback (founder of the Hugo Awards) and Robert H. Goddard (father of American rocketry) to pursue space exploration. Carl Sagan was similarly motivated by the Mars fiction stemming from this era, eventually leading the Viking lander mission. This historical cycle repeats today, as modern projections onto Mars (like Elon Musk’s plans) reflect the same desire for a fresh start or utopian technological leap.
Mars Colonization Challenges
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(01:15:42)
  • Key Takeaway: Establishing a sustainable human presence on Mars faces extreme physiological and environmental hurdles, unlike historical colonization efforts on Earth.
  • Summary: Mars presents lethal challenges including toxic soil, dust storms, radiation, lack of oxygen, and low atmospheric pressure. Physiological degradation, such as bone density loss and eyeball shape changes, begins within weeks of space travel. The body will degrade during the six-to-eight-month journey, and Martian gravity (one-third of Earth’s) adds further unknown physiological stress.
Fermi Paradox and Self-Destruction
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(01:17:40)
  • Key Takeaway: The Fermi Paradox may be explained by the short lifespan of technological civilizations, potentially averaging only a few hundred years before self-destruction.
  • Summary: The speaker believes extraterrestrial life exists but is not yet detected, possibly due to limitations of current radio communication methods. A significant factor in the paradox might be the short duration civilizations survive before collapse, calculated by one source to be as low as 410 years based on historical data. Even advanced structures would erode over geological timescales, meaning ancient alien visitors might leave no discernible trace.
Low Information Sightings
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(01:25:28)
  • Key Takeaway: Modern low-resolution visual evidence, like blurry UAP videos or misidentified satellite trains, fuels patternicity and imagination in the absence of clear data.
  • Summary: The prevalence of blurry photographs and videos in UFO/UAP sightings creates a ’low information zone’ where the brain fills in details, similar to historical misinterpretations. The proliferation of Starlink satellites now causes amateur astronomers to mistake them for artificial spacecraft near distant planets like Saturn. This ambiguity allows imagination to construct narratives where clear data would otherwise prevail.
Galileo’s Observations and Empiricism
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(01:26:14)
  • Key Takeaway: Modern science requires moving beyond the myth of ‘pure observation’ to acknowledge that interpretation occurs within a scientist’s cultural and psychological context.
  • Summary: Galileo initially observed Saturn as three touching objects because his crude telescopes provided poor data and no existing theory explained planetary rings. Stephen Jay Gould noted that Galileo’s bold declaration, ‘I have observed it,’ marked the shift to modern science, yet it also established a new form of dogma based on unassailable observation. This historical example shows that even foundational scientific progress involves human interpretation constrained by context, not just untrammeled empiricism.