Today we’re continuing our series on Harry Frankfurt’s seminal work, On Bullshit. I have the privilege to speak with Arvind Narayanan co-author of the book AI Snake Oil: What Artificial Intelligence Can Do, What it Can’t, and How to Tell the Difference (Princeton University Press, 2024). Arvind is the perfect guest to explore the subject of bullshit in AI as AI Snake Oil takes on the ridiculous hype ascribed to the promise of AI. AI chatbots often hallucinate and many of the promoters of AI engage in the art of bullshit when selling people on wild and crazy AI applications.

Arvind Narayanan is professor of computer science at Princeton University and director of its Center for Information Technology Policy.

Caleb Zakarin is editor of the New Books Network.

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Machine learning systems are making life-altering decisions for us: approving mortgage loans, determining whether a tumor is cancerous, or deciding if someone gets bail. They now influence developments and discoveries in chemistry, biology, and physics—the study of genomes, extrasolar planets, even the intricacies of quantum systems. And all this before large language models such as ChatGPT came on the scene.
We are living through a revolution in machine learning-powered AI that shows no signs of slowing down. This technology is based on relatively simple mathematical ideas, some of which go back centuries, including linear algebra and calculus, the stuff of seventeenth- and eighteenth-century mathematics. It took the birth and advancement of computer science and the kindling of 1990s computer chips designed for video games to ignite the explosion of AI that we see today. In this enlightening book, Anil Ananthaswamy explains the fundamental math behind machine learning, while suggesting intriguing links between artificial and natural intelligence. Might the same math underpin them both?
As Ananthaswamy resonantly concludes, to make safe and effective use of artificial intelligence, we need to understand its profound capabilities and limitations, the clues to which lie in the math that makes machine learning possible.

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What is reliable knowledge? Listen to philosopher Michael Strevens, author of The Knowledge Machine: How Irrationality Created Modern Science, to understand how science discovers the truth. At the current moment, when expertise is under attack and the idea of truth is contested from all sides, Strevens explains the remarkable success of science’s “irrational” method to settle debates, regardless of philosophical, religious, or aesthetic preferences. Drawing on Thomas Kuhn’s The Structure of Scientific Revolutions—our host Uli Baer’s all-time favorite non-fiction book—, Karl Popper, and others, Strevens shows how science became the most effective tool for uncovering the secrets of nature.

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In A Reverence for Rivers: Imagining an Ethic for Running Waters (OSU Press, 2025), Kurt Fausch draws on his experience as a stream ecologist, his interest in Indigenous cultures, and a thoughtful consideration of environmental ethics to explore human values surrounding freshwater ecosystems. Focusing on seven rivers across the globe—from the Salmon River in Oregon to the Sarufutsu River in Japan—he examines the growing ethical dilemmas threatening our rivers, including increasing demands for water, habitat fragmentation, overfishing, and deepening climate change.

How do we decide which rivers deserve legal protection? What is our right to water as humans? And how do we foster resilient rivers? Through a combination of scientific expertise and thoughtful observations of the natural world, Fausch translates the science of rivers into accessible language for readers and begins to address these questions. He weaves deep Indigenous histories throughout the book and includes personal visits to tribal lands to explore the traditional values held by several Indigenous groups. Fausch reminds us that our connection to rivers is personal and grounded in specific places, flowing from the stories we carry about our relationships with and responsibilities to these rivers.

In a final essay Fausch ponders Aldo Leopold’s statement that “nothing so important as an ethic is ever written,” but instead evolves in the minds of a thinking community. A Reverence for Rivers speaks to both the mind and the heart, offering perspectives so that we might begin to imagine and create an ethic for living with and caring for the running waters on which we rely for so much.

Dr. Kurt Fausch is Professor Emeritus in the Department of Fish, Wildlife, and Conservation Biology at Colorado State University, where he taught for 35 years. His research collaborations in stream fish ecology and conservation have taken him throughout Colorado and the West, and worldwide, including to Hokkaido in northern Japan. His experiences were chronicled in the PBS documentary RiverWebs, and the 2015 book For the Love of Rivers: A Scientist’s Journey which won the Sigurd F. Olson Nature Writing Award. He has received lifetime achievement awards from the American Fisheries Society and the World Council of Fisheries Societies, and the Leopold Conservation Award from Fly Fishers International.

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The 15,000-year story of how grass seduced humanity into being its unwitting labor force--and the science behind it.

Domesticated crops were not human creations, and agriculture was not simply invented. As Robert N. Spengler shows, domestication was the result of an evolutionary process in which people played a role only unwittingly and as actors in a numberless cast that spanned the plant and animal kingdoms. Nature's Greatest Success: How Plants Evolved to Exploit Humanity (Univ of California Press, 2025) is the first book to bring together recent scientific discoveries and fascinating ongoing research to provide a systematic account of not only how agriculture really developed but why.

Through fifteen chapters, this book dives deep into the complex processes that drove domestication and the various roles that plants and animals, including humans, played in bringing about those changes. At the intersection of popular history, archaeology, and evolutionary biology, Nature's Greatest Success offers a revolutionary account of humanity not at the apex of nature but deeply embedded in the natural world and the evolutionary processes that continue to guide it even today.

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In Seminal: On Sperm, Health, and Politics, Rene Almeling, Lisa Campo-Engelstein, and Brian T. Nguyen come together across disciplines to offer a kaleidoscopic view of the relationship between sperm, health, and the intersecting politics of gender, race, and reproduction. Always insightful and often provocative, the essays in this unprecedented collection cover a broad range of issues related to male reproductive and sexual health—including the latest technological developments for creating sperm; the specter of eugenics in contemporary medical markets; emerging approaches to male contraceptive methods, male infertility, and trans healthcare; controversies surrounding sperm donors and sperm banking; disparities in sexual health education for teens—all the while attending to the enormous variation in how individuals and societies understand, embody, and experience sperm.

At a time when the most basic rights of reproductive autonomy are under severe threat, contributors to this volume argue this is precisely the moment to rethink and reimagine sperm from a variety of medical, political, and cultural perspectives. Ultimately, this volume aims to contribute to a more reproductively just society and broaden conversations around bodies, health and equity in the United States.

Michael O. Johnston, Ph.D. is a Assistant Professor of Sociology at William Penn University. He is the author of The Social Construction of a Cultural Spectacle: Floatzilla (Lexington Books, 2023) and Community Media Representations of Place and Identity at Tug Fest: Reconstructing the Mississippi River (Lexington Books, 2022). His general area of study is at the intersection of space, behavior, and identity. He is currently conducting research about: escape rooms, the use of urban design in downtown historical neighborhoods of rural communities, and a study on belongingness in college and university. To learn more about Michael O. Johnston you can go to his personal website, Google Scholar, Bluesky (@professorjohnst.bsky.social), Twitter (@ProfessorJohnst), or by email ([email protected])

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Einstein's Fridge: How the Difference Between Hot and Cold Explains the Universe (Scribner, 2021) tells the incredible epic story of the scientists who, over two centuries, harnessed the power of heat and ice and formulated a theory essential to comprehending our universe. “Although thermodynamics has been studied for hundreds of years…few nonscientists appreciate how its principles have shaped the modern world” (Scientific American). Thermodynamics—the branch of physics that deals with energy and entropy—governs everything from the behavior of living cells to the black hole at the center of our galaxy. Not only that, but thermodynamics explains why we must eat and breathe, how lights turn on, the limits of computing, and how the universe will end.
The brilliant people who decoded its laws came from every branch of the sciences; they were engineers, physicists, chemists, biologists, cosmologists, and mathematicians. From French military engineer and physicist Sadi Carnot to Lord Kelvin, James Joule, Albert Einstein, Emmy Noether, Alan Turing, and Stephen Hawking, author Paul Sen introduces us to all of the players who passed the baton of scientific progress through time and across nations. Incredibly driven and idealistic, these brave pioneers performed groundbreaking work often in the face of torment and tragedy. Their discoveries helped create the modern world and transformed every branch of science, from biology to cosmology.
“Elegantly written and engaging” (Financial Times), Einstein’s Fridge brings to life one of the most important scientific revolutions of all time and captures the thrill of discovery and the power of scientific progress to shape the course of history.

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Peoples & Things host, Lee Vinsel, talks with space anthropologist, writer, and Virginia Tech doctoral candidate, Savannah Mandel, about her book, Ground Control: An Argument for the End of Human Space Exploration (Chicago Review Press, 2025). The book uses history, ethnography, participant observation in policy-making, and other forms of evidence to argue for the discontinuation of human space exploration until pressing forms of human suffering are brought to an end on Earth. The pair also talk about a number of other projects Mandel is working on, including a history of apocalyptic visions and her dissertation on the history of the space mining industry.

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The vagus nerve is fundamental to our health and vitality, coordinating critical functions from the precise heartbeat we need to exercise or rest to the balance of appetite and digestion. Made up of 200,000 fibers, the vagus nerve sends thousands of electrical signals every second between your brain and your most important organs. Yet despite its essential role in life, important vagus nerve functions have eluded centuries of scientific investigation. Now neurosurgeon and researcher Dr. Kevin Tracey has discovered the previously unknown power of the vagus nerve to reverse inflammation, balance the immune system, treat chronic illness, and keep our organs humming together in harmony.
In The Great Nerve: The New Science of the Vagus Nerve and How to Harness Its Healing Reflexes (Penguin, 2025), Dr. Tracey shows us how stimulating the vagus nerve with a tiny electrical implant has the potential to reverse life-altering diseases like rheumatoid arthritis, inflammatory bowel disease, lupus, MS, diabetes, obesity, stroke, depression, Alzheimer’s and Parkinson’s. If this sounds too good to believe, Dr. Tracey shares stories of patients who have gone from being nearly bedridden to running and dancing, along with the science that makes possible these recoveries. He also explains the evidence for lifestyle strategies like ice baths, meditation, exercise, and breathwork that can maintain and improve vagus nerve function.
By opening the door to the new field of neuroimmunology, The Great Nerve  not only revolutionizes how we understand and treat disease, it gives us unprecedented hope for our health. This is the story of your body’s ability to heal itself.

This interview was conducted by Dr. Miranda Melcher whose book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars. You can find Miranda’s interviews on New Books with Miranda Melcher, wherever you get your podcasts.

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How did the addition of lifeboats after the Titanic shipwreck contribute to another tragedy in Chicago harbor three years later? How efficient are wild animals as investors, and how do dog breeds become national symbols? Why have scientific breakthroughs so often originated in the study of shadows? How did the file card prepare scholarship and commerce for the rise of electronic data processing, and why did the visual metaphor of the tab survive into today's graphic interfaces? Why have Amish artisans played an important role in manufacturing advanced technology? Why was United Shoe Machinery the Microsoft of the 1890s? Surprises like these, Edward Tenner believes, can help us deal with the technological issues that confront us now.

Since the 1980s, Edward Tenner has contributed essays on technology, design, and culture to leading magazines, newspapers, and professional journals, and has been interviewed on subjects ranging from medical ethics to typography. Why the Hindenburg Had a Smoking Lounge: Essays in Unintended Consequences (American Philosophical Society Press, 2025)--named for one of the paradoxes that can result from the inherent contradictions between consumer safety and product marketing--brings many of Tenner's essays together into one volume for the first time, accompanied by new introductions by the author on the theme of each work. As an independent historian and public speaker, Tenner has spent his career deploying concepts from economics, engineering, psychology, science, and sociology, to explore both the negative and positive surprises of human ingenuity.

Edward Tenner is an independent writer and Distinguished Scholar in the Smithsonian's Lemelson Center for the Study of Invention and Innovation. He was a visiting scholar at the Institute for Advanced Study at Princeton and teaches the course Understanding Disasters at Princeton University.

Caleb Zakarin is editor of the New Books Network.

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