By most popular accounts, the universe started with a bang some 13.8 billion years ago. But what happened before the Big Bang? And how do we know it happened at all?

Cosmologist Niayesh Afshordi and science communicator Phil Halper offer a tour of the peculiar possibilities: bouncing and cyclic universes, time loops, creations from nothing, multiverses, black hole births, string theories, and holograms.

Incorporating insights from Afshordi’s cutting-edge research and Halper’s original interviews with scientists like Stephen Hawking, Roger Penrose, and Alan Guth, Afshordi and Halper compare these models for the origin of our origins, showing each theory’s strengths and weaknesses and explaining new attempts to test these notions. But most of all, Afshordi and Halper show that this search is filled with wonder, discovery, and community—all essential for remembering a forgotten cosmic past.

Niayesh Afshordi is professor in the Department of Physics and Astronomy at the University of Waterloo and associate faculty at the Perimeter Institute for Theoretical Physics in Ontario, Canada. His prize-winning research focuses on competing models for the early universe, dark energy, dark matter, black holes, holography, and gravitational waves.

Phil Halper is a fellow of the Royal Astronomical Society and a science popularizer. He is the creator of the popular YouTube series Before the Big Bang, which has had several million views. His astronomy images have been featured in major media outlets including The Washington Post, the BBC, and The Guardian, and he has published several papers in peer-reviewed journals.

In 2010, in a small New Hampshire town, next door to a copy center and framing shop, a ghost lab opened. The Kitt Research Initiative’s mission was to use the scientific method to document the existence of spirits. Founder Andy Kitt was known as a straight-shooter; he was unafraid—perhaps eager—to offend other paranormal investigators by exposing the fraudulence of their less advanced techniques. But when KRI started to lose money, Kitt began to seek funding from the paranormal community, attracting flocks of psychics, alien abductees, witches, mediums, ghost hunters, UFOlogists, cryptozoologists and warlocks from all over New England, and the world. And there were plenty of them around.

Matthew Hongoltz-Hetling, author of the new book The Ghost Lab, explains the wild ecosystem of paranormal profiteers and consumers through the astonishing story of what happened in this one small town. He also maps the trends of declining scientific literacy, trust in institutions, and the diffusion of a culture that has created space for armies of pseudoscientists to step into the minds of an increasingly credulous public.

Matthew Hongoltz-Hetling is a freelance journalist specializing in narrative features and investigative reporting. He was a finalist for the Pulitzer Prize. He is the author of A Libertarian Walks Into a Bearand It Sounds Like a Quack. His new book is The Ghost Lab: How Bigfoot Hunters, Mediums, and Alien Enthusiasts are Wrecking Science.

This is the inside story of the CIA’s secret mind control project, MKULTRA, using never-before-seen testimony from the perpetrators themselves.

Sidney Gottlieb was the CIA’s most cunning chemist. As head of the infamous MKULTRA project, he oversaw an assortment of dangerous―even deadly―experiments. Among them: dosing unwitting strangers with mind-bending drugs, torturing mental patients through sensory deprivation, and steering the movements of animals via electrodes implanted into their brains. His goal was to develop methods of mind control that could turn someone into a real-life “Manchurian candidate.”

In conjunction with MKULTRA, Gottlieb also plotted the assassination of foreign leaders and created spy gear for undercover agents. The details of his career, however, have long been shrouded in mystery. Upon retiring from the CIA in 1973, he tossed his files into an incinerator. As a result, much of what happened under MKULTRA was thought to be lost―until now.

Historian John Lisle has uncovered dozens of depositions containing new information about MKULTRA, straight from the mouths of its perpetrators. For the first time, Gottlieb and his underlings divulge what they did, why they did it, how they got away with it, and much more. Additionally, Lisle highlights the dramatic story of MKULTRA’s victims, from their terrible treatment to their dogged pursuit of justice.

The consequences of MKULTRA still reverberate throughout American society.

John Lisle is a historian of science and the American intelligence community. He was on the show for his previous book, The Dirty Tricks Department, about Stanley Lovell, the OSS precursor to the CIA, and the Masterminds of World War II Secret Warfare. In Vol. 25, No. 2 of Skeptic he wrote about MKULTRA, the CIA program in search of mind control technology. His new book is Project Mind Control: Sidney Gottlieb, the CIA, and the Tragedy of MKULTRA.

In this eye-opening episode, Michael Shermer chats with evolutionist Telmo Pievani about the surprising coexistence—and hybridization—of Neanderthals and Homo sapiens.

They discuss recent scientific discoveries, the evolving understanding of race and biology, and the crucial role of serendipity in advancing scientific knowledge.

This episode offers a nuanced perspective on how unexpected findings continue to reshape our understanding of human origins and the scientific process itself.

Telmo Pievani is Full Professor in the Department of Biology at the University of Padua, where he covers the first Italian chair of Philosophy of Biological Sciences. A leading evolutionist, science communicator, and columnist for Corriere della Sera, he is the author of The Unexpected Life, Creation Without God, and Imperfection (MIT Press). His new book is Serendipity: The Unexpected in Science.

Amid rising concerns about AI, inequality, trade wars, and globalization, New Yorker staff writer and Pulitzer Prize finalist John Cassidy takes a bold approach: he tells the story of capitalism through its most influential critics.

From the Luddites and early communists to the Wages for Housework movement and modern degrowth advocates, Cassidy’s global narrative features both iconic thinkers—Smith, Marx, Keynes—and lesser-known voices like Flora Tristan, J.C. Kumarappa, and Samir Amin.

John Cassidy has been a staff writer at The New Yorker since 1995. He writes a regular column, The Financial Page. He holds degrees from Oxford, Columbia, and New York Universities. His new book is Capitalism and Its Critics: A History from the Industrial Revolution to AI.

What does your diet have to do with your mood? Is mercury in fish really dangerous? Psychiatrist Dr. Drew Ramsey joins Michael Shermer to discuss the science behind nutritional psychiatry and how food, sleep, exercise, and social habits influence brain health. They explore why mental health issues are rising—especially among teens—and what role parenting, social media, and modern lifestyles play.

The conversation also covers the effectiveness of SSRIs and other treatments, the role of inflammation in mental health, and the importance of sleep and tracking sleep quality.

Drew Ramsey, MD is a board-certified psychiatrist, author, and leading voice in Nutritional Psychiatry and integrative mental health. He is a Fellow of the American Psychiatric Association. For twenty years, he served as an assistant clinical professor of psychiatry at Columbia University. He has authored four books, including the international bestseller Eat to Beat Depression and Anxiety. His new book is Healing the Modern Brain.

Jacob Mchangama, author of Free Speech: A History from Socrates to Social Media, joins Michael to examine the evolving landscape of free expression amid rising political and cultural tensions. They discuss how far governments, universities, and tech platforms should go in regulating speech, and what’s at stake when they do.

In this episode:

• Should non-citizens have the same speech protections as citizens?
• Social media, mental health, radicalization, and the “moderation dilemma”
• The global shift toward stricter regulation of speech
• How today’s most divisive issues test the limits of free expression

Jacob Mchangama is the founder and executive director of the Future of Free Speech, professor at Vanderbilt University, and senior fellow at the Foundation for Individual Rights and Expression (FIRE).

Is it really possible to change your entire personality in a year? An award-winning journalist experiments with her own personality to find out—and reveals the science behind lasting change.

Research shows that you can alter your personality traits by behaving in ways that align with the kind of person you’d like to be—a process that can make you happier, healthier, and more successful. Olga embarked on an “experiment” to see whether it’s possible to go from dwelling in dread to radiating joy. For one year, she clicked “yes” on a bucket list of new experiences—from meditation to improv to sailing—that forced her to at least act happy. With a skeptic’s eye, Olga brings you on her journey through the science of personality, presenting evidence-backed techniques to help you change your mind for the better.

Olga Khazan is a staff writer for The Atlantic and the author of Weird: The Power of Being an Outsider in an Insider World. She has written for The New York Times, the Los Angeles Times, and other publications. Her new book is Me, But Better: The Science and Promise of Personality Change.