We're the single species who composes symphonies, erects skyscrapers, builds computers, and regularly gets off the planet. But how did human intelligence evolve from our ancestors in the animal kingdom? And now that our species is scintillatingly shrewd, what does a knowledge of our road mean as we work to build intelligence artificially? Join Eagleman this week with Max Bennett, an especially smart human who illuminates a path through the 600 million year story of brain power in his book "A Brief History of Intelligence".

Why are conspiracy theories a natural output of the brain? What do they have to do with puzzle-solving, cognitive dissonance, ingroups/outgroups, and storytelling? If you hear an unlikely explanation for something, what are effective and ineffective ways to assess it? Join Eagleman to understand from the point of view of the brain why conspiracy theories have always been so pervasive in human societies.

Did magicians discover tricks of the mind centuries before neuroscientists? Why can’t you see what they’re doing right in front of you? How do magicians steer your attention or appear to read your mind? Dive into the trapdoors of the human brain which allow the mind to get fooled. Join Eagleman with several guests: magician Robert Strong and cognitive neuroscientists Stephen Macknik and Susana Martinez-Conde.

If you could get a kiss from your favorite celebrity, how long would you want to wait before receiving it? And why do things seem less meaningful or joyful over time than they were at the beginning? What does any of this have to do with Netflix releasing all the episodes of a new show at once, or why companies come out with new and improved products every year, or why French revolutionaries wanted to make a week five days long instead of seven? Join Eagleman and cognitive neuroscientist Tali Sharot to find out why everything dulls with time and what we can do to recover the shine.

Why do we have so much circuitry in the brain devoted to faces? Why does your electrical plug seem to look like a little face? Did aliens plant a signal for us on Mars, or are we looking at a quirk of our own brains? What is face blindness and what is a super recognizer? What does any of this have to do with looking at a magazine upside down, or why computer algorithms sometimes think a jack-o'-lantern is a person? Join Eagleman for a deep dive into something so fundamental as to be typically invisible.

The brain easily forms ingroups and outgroups – and shows different responses when viewing one or the other. At the extreme, the brain stops seeing outgroup members as people, but more like objects. But are there ways to rehumanize? And in this context, what do heroes look like? In this episode, Eagleman talks with two men -- Maoz Inon and Aziz Abu Sarah -- one Israeli and one Palestinian. The two men, full of pain and sorrow, are fighting. But they are fighting side by side. They are fighting to repair the future. Learn what peacebuilders are, how they function, and what this has to do with the neuroscience of dehumanization, ingroups, outgroups, and the possibilities -- both political and neural -- for rehumanization.

Why do you sometimes feel that you trust this person but not that one -- for reasons you can't quite put your finger on? What signals does the brain vacuum up in your daily life, and what fraction of those does your conscious mind have access to? When does intuition steer us wrong? And what is the future of intuition, as we build new technologies to take the myriad signals racing around in the dark of our brains and bodies and bring them to light? Join Eagleman and his guest, cognitive neuroscientist Joel Pearson, to unpack when to trust and when to ignore the signals of intuition.

Why do we believe our own truths so strongly? What is steel-manning, and why is it so important? What does any of this have to do with F. Scott Fitzgerald, John Keats, or the future of our society? This week's episode deals with polarization and what we might do about it. Join Eagleman and his guest Isaac Saul, who works to represent different points of view in his newsletter Tangle -- all in the name of the intellectual humility that can blossom from grappling with conflicting ideas.