Why do we believe what we believe? Why is changing our opinions so difficult, and why does a challenged belief so often feel like a personal attack? What if beliefs didn’t evolve to be true, but to be socially useful? Today we speak with Sam Harris about the topic of our beliefs: how we see the world and what we take to be true about it.

Is intelligence a property of individual brains, or is it something that emerges from many brains trying to align with one another? How can we build AI agents to improve our understanding of the world and to mediate between rivaling humans? For this and much more, we speak today with Danielle Perszyk, a cognitive scientist who leads the human-computer interaction team at Amazon’s AGI Lab.

What if your confidence in your political beliefs does not correlate with their accuracy? Why does a pundit's outrage often feel so convincing and nuance so unsatisfying? Are conspiracy theories a predictable feature of human brains? Is there any way to stop ourselves from mistaking our feelings for conclusions? How can we come to be clearer thinkers? Today we speak with political commentator Kaizen Asiedu about how we arrive at our hot takes on the world.

Medications are among the most important advancements of science, but their social consequences are often complex. What if some of our most common diseases are design flaws of modern life? Does it matter if we're fixing a root cause rather than just circumventing it? If a pill can quiet hunger, pain, or anxiety, is that "cheating"? Today we talk about the fascinating world of prescription drugs with science journalist Thomas Goetz.

What does it mean for your life to matter? We all talk a lot about happiness, pleasure, and meaning... but what if the real engine underneath it all is the need to feel we count? Is it possible that depression, extremism, and ambition all stem from the same psychological source? When is political polarization less about beliefs and more about threatened significance? Join Eagleman with philosopher and writer Rebecca Goldstein, author of "The Mattering Instinct".

What exactly is hypnosis? We’ve all heard of circus-like versions, but is there a real element to hypnosis that psychiatrists and neuroscientists are able to leverage? Can attention and expectation change what we feel (such as pain or anxiety)? What do suggestible states reveal about the brain’s pathways? How does hypnosis compare to meditation, flow states, or psychedelic drugs? Today we speak with David Spiegel, Stanford psychiatrist and one of the world’s experts in hypnosis.

Happy Holidays- New Episodes starting Jan. 5th

Every cell in your body changes, so why do you have a sense of continuity of the self – as though you're the same person you were a month ago? What does this have to do with the watercraft of the Greek demigod Theseus, or the End-of-History illusion, or why you go through so much trouble to make things comfortable for your future self, even though you don't know that person? And if there really were an afterlife, what age would your deity make everyone for living out their eternities? Join this week for a two-parter about the mysteries of selfhood.

Happy Holidays- New episodes starting Jan. 5th

Why did lions look so strange in medieval European art? What does this have to do with Native American folklore, eyewitness memory of a car accident, or what a person remembers 3 years after witnessing the 9/11 attack on the World Trade Center? And what does any of this have to do with flashbulb memories, misinformation, and the telephone game that you played as a child? Join Eagleman for part 1 of an astonishing journey into what we believe about our memories.