Author's Introduction
- Suddenly, everyone is talking about aliens. After decades on the cultural margins, the question of life in the Universe beyond Earth is having its day in the sun. The next big multibillion-dollar space telescope (the successor to the James Webb) will be tuned to search for signatures of alien life on alien planets and NASA has a robust, well-funded programme in astrobiology. Meanwhile, from breathless newspaper articles about unexplained navy pilot sightings to United States congressional testimony with wild claims of government programmes hiding crashed saucers, UFOs and UAPs (unidentified anomalous phenomena) seem to be making their own journey from the fringes.
- What are we to make of these twin movements, the scientific search for life on one hand, and the endlessly murky waters of UFO/UAP claims on the other? Looking at history shows that these two very different approaches to the question of extraterrestrial life are, in fact, linked, but not in a good way. For decades, scientists wanting to think seriously about life in the Universe faced what’s been called the ‘giggle factor’, which was directly related to UFOs and their culture. More than once, the giggle factor came close to killing off the field known as SETI (the search for extraterrestrial intelligence). Now, with new discoveries and new technologies making astrobiology a mainstream frontier of astrophysics, understanding this history has become important for anyone trying to understand what comes next. But for me, as a researcher in the field of technosignatures (signs of advanced alien tech) – the new face of SETI – getting past the giggle factor poses an existential challenge.
- I am the principal investigator of NASA’s first ever grant to study signatures of intelligent life from distant exoplanets. My colleagues and I are tasked with developing a library of technosignatures or evidence of technology-wielding life forms on distant planets. Taking on that role has been the culmination of a lifetime fascination with the question of life and the Universe, a fascination that formed when I was a kid in the 1970s, drinking deep from the well of science fiction novels, UFO documentaries and Star Trek reruns. Early on, as a teenager reading both Carl Sagan and Erich von Däniken (the author of Chariots of the Gods), I had to figure out how to separate the wheat from the chaff. This served as a kind of training ground for dealing with questions facing me and my colleagues about proper standards of evidence in astrobiology. It’s also why, as a public-facing scientist, I must work to understand how people not trained in science come to questions surrounding UFOs as aliens. That is what drove me, writing a recent popular-level account of astrobiology’s frontiers called The Little Book of Aliens (2023), to stare hard into the entangled history of UFOs, the scientific search for life beyond Earth, and the all-important question of standards of evidence.
Author's Conclusion
- It was in 2019 that NASA awarded me and my colleagues the first grant to study atmospheric technosignatures. While there are still only a handful of technosignature grants compared with biosignature studies, it was the first indication that the giggle factor was finally waning. Since then, our group has worked hard to provide new examples of possible technosignatures including some that might be searched for with the James Webb Space Telescope. We’ve also demonstrated that there is no reason to suppose that biosignatures will be more common than technosignatures. Since the exact same techniques are required to search for both bio- and technosignatures, there’s every reason to carry out both kinds of search at the same time.
- And those standards of evidence developed for biosignature searches will be just as relevant for technosignature work. Our group, led by the astrophysicist Manasvi Lingam from the Florida Institute of Technology, recently published the first work attempting to lay out a framework for evaluating false positives in technosignatures. While there is enormous work ahead of us, it’s projects like these that will allow us to fully understand the confidence we can ascribe to any claim of an intelligent-life detection.
- With the giggle factor receding for the scientific search for life, where does that leave UFOs and UAPs? There, the waters remain muddied. It is a good thing that pilots feel they can report sightings without fear of reprisal as a matter of air safety and national defence. And an open, transparent and agnostic investigation of UAPs could offer a masterclass in how science goes about its business of knowing rather than just believing. In The Little Book of Aliens, I even explained how such an investigation might be conducted (the recent NASA UAP panel and the Galileo Project are exploring these kinds of options). But if my colleagues and I claimed we’d found life on another world, we’d be required to provide evidence that meets the highest scientific standards. While we should let future studies lead us where they may, there is simply no such evidence surrounding UFOs and UAPs that meets these standards today. In fact, at a recent hearing conducted by NASA’s UAP panel, it was revealed that government studies show only a small percentage of reported sightings failed to find a reasonable explanation. Many of the remaining cases did not have enough data to even begin an attempt at identification. The sky is simply not awash in unexplained phenomena.
- In the end, what matters is that, after thousands of years of arguing over opinions about life in the Universe, our collective scientific efforts have taken us to the point where we can finally begin a true scientific study of the question. The next big space telescope NASA is planning will be called the Habitable Worlds Observatory. The name tells you all you need to know. We’re going all in on the search for life in the Universe because we finally have the capabilities to search for life in the Universe. The giggle factor is finally history.
Author Narrative
- Adam Frank is professor of astrophysics at the University of Rochester in New York. He is the author of several books, the latest being The Little Book of Aliens (2023).
Notes
- This is interesting enough and is a plug for the author's latest book, which - at 240 pages - is not that 'little' but is - at £25.50 - rather too expensive.
- It is highly sceptical of UFOs and the conspiracy theories associated with them. It recounts how such fantasies got in the way of real research into the possibilities of extraterrestrial life.
- All this changed with the discovery of exoplanets.
- I might follow all this up one day …
Comment:
- Sub-Title: "Not long ago the search for extraterrestrials was considered laughable nonsense. Today, it’s serious and scientific"
- For the full text see Aeon: Frank - Alien life is no joke.
Text Colour Conventions (see disclaimer)
- Blue: Text by me; © Theo Todman, 2025
- Mauve: Text by correspondent(s) or other author(s); © the author(s)