Accompanied by a selection of guests, Professor Jortner takes you through a mind-bending exploration of the history that could have been. Captivating storytellers and imaginative thinkers, these experts show how history is contingent on split-second decisions, near misses, and sheer dumb luck. By reflecting on what didn’t happen, 10 Great What-Ifs of American History gives you new insights on what did happen—and the impact on our world today.

We’re living in a golden age of scientific breakthroughs and technological advancements. Now, you have the chance to dig into some of the most fascinating and important scientific advancements in recent years. Unexpected, consequential, and often counterintuitive, 12 Revolutionary Discoveries That Could Change Everything offers an inspiring introduction to science in the 21st century. Taught by Scientific American editor in chief Laura Helmuth, these eye-opening lectures will satiate even the most inquisitive mind.

Religion is foundational to what it means to be human. Our quest for meaning is as ancient as our very existence, stretching back to a time when Neanderthal burials and Paleolithic figurines suggest our ancestors recognized a power that transcended visible reality. From ancient civilizations to the 21st century, belief in a higher power seems to be a universal human instinct. These 12 thought-provoking lectures introduce you to the world of comparative religion, giving you insights into a variety of religious expressions and human cultures.

In the 12 fascinating lectures of Gut Health Explained, Dr. Gabrielle Fundaro shares the latest scientific knowledge about the trillions of organisms that live in your gut. In this course, you'll learn how to navigate the evolving landscape of gut microbiome science while gaining a deep understanding of the intricate interplay between you and your microbiome.

Whether you’re buying a home, saving for retirement, running a business, or just plain speculating, it’s important to understand financial markets. These are the engines of commerce in today’s world, powering economic activity and steering the flow of capital. Taught by Professor Connel Fullenkamp of Duke University, Understanding the World of Financial Markets is aimed at the ordinary investor and surveys the impressive range of financial markets—from stocks and bonds to futures, options, real estate, private equity, and virtual assets.

In the 24 fascinating lectures of Existentialism and the Authentic Life, Professor Skye C. Cleary will lead you through the writings of many existentialists to help you understand how they addressed the biggest of all questions. Writing about love, death, sex, war, plagues, intrigue, murder, deception, and more, these thinkers guide you toward living an authentic and meaningful life in a world that often seems absurd.

“Who are you?” Chances are you’d answer this question by describing the highlights of your personality and life experiences. But if you’d been asked this same question yesterday, you might have responded with a slightly different description. Does that mean you are a particular person today but were a different person yesterday? And what about tomorrow? Welcome to the slippery, shape-shifting nature of memory. As Professor Gabrielle Principe reveals, “you” are the conglomeration of the often-unreliable information your brain decides to feed you at any given moment.

In London in the Time of Dickens, you’ll get the unique opportunity to experience the British capital through the eyes of a literary master whose work is inextricably tied to the city and its rich history. Throughout 12 lectures taught by Professor Lillian Nayder of Bates College, you’ll tour the city of London in a time of rapid transformation through the life and work of Charles Dickens, uncovering the history of the metropolis, while also witnessing the everyday experiences of Londoners from all walks of life as Dickens represents them.

In Communism in Decline: From Sputnik to Gorbachev, Professor Vejas Gabriel Liulevicius reveals the internal and external forces that ripped apart the grand communist experiment. What were the mistakes made by the Soviet leaders who believed too deeply in their own propaganda? And why were they not able to see the many ironies in their own poor decisions? In 12 fascinating lectures, you will learn how the Soviet Union went from winning the space race against the United States in 1957 to Gorbachev’s resignation and the dissolution of the great experiment in 1991.

For millennia, philosophers and scientists have been trying to unlock the secrets of the mind with only limited success—until now. Today, with modern technologies including the best in neuroscience, medical imaging, and recent advances in artificial intelligence, we are making more progress than ever before. In Introduction to Cognitive Science, Professor Thad A. Polk takes you on a fascinating tour of the latest discoveries in the relatively new field of cognitive science. In 24 exciting lectures, Professor Polk shares dozens of the most challenging questions in cognitive science today.

Railways are one of the most important inventions in modern history. From the 1825 opening of the Stockton and Darlington Railway in England, trains revolutionized both travel and trade and radically changed the way we experience the world. In the 24 richly illustrated lectures of How Railways Transformed the World, you’ll experience the amazing world and impact of railways, from the early 19th century to today’s futuristic trains, including extensive material on the pleasure and appeal of rail travel today.

10 interview-based episodes that take ancient designs and applies them to modern lives. Your expert is Prince EA, an artist and inspirational speaker who’s spent the greater part of his career thinking about the ancient world.

In the 12 fascinating lectures of Warping Reality: Inside the Psychology of Cults, you will learn about some of the most widely known cults of modern times. But unlike any standard news reporting or documentary about the Peoples Temple, The Manson “Family,” The Branch Davidians, Heaven’s Gate, Children of God, the Unification Church, and NXIVM, your expert, Dr. Wind Goodfriend, will help you explore the psychology of these cults. How could these cult leaders have committed such heinous crimes under the guise of “helping” members in their development?

The promise of America is that the country is based on an idea, one where everyone is created equal and equally free to chart their own course. From 13 newly independent states ratifying a national constitution to the heated debates in the halls of Congress today, American politics is about negotiation over what our country is—and where we are going.

Our first foray into World Heritage sites, World Heritage Sites: Exploring the World’s Greatest Places, celebrated UNESCO’s remarkable initiative, exploring a rich sampling of these sites across the globe. In this exciting sequel of 12 thrilling lectures, World Heritage Sites II: 12 More of the World’s Greatest Places, expert historian Professor Jacobs introduces you to a dozen more extraordinary treasures of archaeology, architecture, art, engineering, and the natural world.

Richard Dawkins' brilliant reformulation of the theory of natural selection has the rare distinction of having provoked as much excitement and interest outside the scientific community as within it. His theories have helped change the whole nature of the study of social biology, and have forced thousands to rethink their beliefs about life.

Astrophysicist Neil deGrasse Tyson has attracted one of the world’s largest online followings with his fascinating, widely accessible insights into science and our universe. Now, Tyson invites us to go behind the scenes of his public fame by unveiling his candid correspondence with people across the globe who have sought him out in search of answers. In this hand-picked collection of 100 letters, Tyson draws upon cosmic perspectives to address a vast array of questions about science, faith, philosophy, life, and of course, Pluto.

How the Earth Works takes you on an astonishing journey through time and space. In 48 lectures, you will look at what went into making our planet - from the big bang, to the formation of the solar system, to the subsequent evolution of Earth.

Hilarious, fascinating, and a roller coaster of dizzying, historical what-ifs, Napoleon's Hemorrhoids is a potpourri for serious historians and casual history buffs. In one of Phil Mason's many revelations, you'll learn that Communist jets were two minutes away from opening fire on American planes during the Cuban missile crisis, when they had to turn back as they were running out of fuel. You'll discover that before the Battle of Waterloo, Napoleon's painful hemorrhoids prevented him from mounting his horse to survey the battlefield.

Chemistry and Our Universe: How It All Works is your in-depth introduction to this vital field, taught through 60 engaging half-hour lectures that are suitable for any background or none at all. Covering a year’s worth of introductory general chemistry at the college level, plus intriguing topics that are rarely discussed in the classroom, this amazingly comprehensive course requires nothing more advanced than high-school math. Your guide is Professor Ron B. Davis, Jr., a research chemist and award-winning teacher at Georgetown University.

Welcome to the Universe is a personal guided tour of the cosmos by three of today's leading astrophysicists. Inspired by the enormously popular introductory astronomy course that Neil deGrasse Tyson, Michael A. Strauss, and J. Richard Gott taught together at Princeton, this book covers it all - from planets, stars, and galaxies to black holes, wormholes, and time travel.

From launchpad explosions to a pernicious cricket infestation to the demanding management style of Musk himself, the rise of SpaceX was beset with challenges and far from inevitable. Find out how the startup beat the odds and flew high enough to outpace their rivals... and where they're going next.

How do today's most successful tech companies - Amazon, Google, Facebook, Netflix, Tesla - design, develop, and deploy the products that have earned the love of literally billions of people around the world? Perhaps surprisingly, they do it very differently from the vast majority of tech companies. In Inspired, technology product management thought leader Marty Cagan provides listeners with a master class in how to structure and staff a vibrant and successful product organization and how to discover and deliver technology products that your customers will love.

In The Butchering Art, the historian Lindsey Fitzharris reveals the shocking world of 19th-century surgery on the eve of profound transformation. She conjures up early operating theaters - no place for the squeamish - and surgeons, working before anesthesia, who were lauded for their speed and brute strength. They were baffled by the persistent infections that kept mortality rates stubbornly high. A young, melancholy Quaker surgeon named Joseph Lister would solve the deadly riddle and change the course of history.

In this illuminating audiobook, Tyson and coauthor James Trefil, a renowned physicist and science popularizer, take on the big questions that humanity has been posing for millennia - How did life begin? What is our place in the universe? Are we alone? - and provide answers based on the most current data, observations, and theories.

Accompanied by a selection of guests, Professor Jortner takes you through a mind-bending exploration of the history that could have been. Captivating storytellers and imaginative thinkers, these experts show how history is contingent on split-second decisions, near misses, and sheer dumb luck. By reflecting on what didn’t happen, 10 Great What-Ifs of American History gives you new insights on what did happen—and the impact on our world today.

In the 24 fascinating lectures of Existentialism and the Authentic Life, Professor Skye C. Cleary will lead you through the writings of many existentialists to help you understand how they addressed the biggest of all questions. Writing about love, death, sex, war, plagues, intrigue, murder, deception, and more, these thinkers guide you toward living an authentic and meaningful life in a world that often seems absurd.

“Who are you?” Chances are you’d answer this question by describing the highlights of your personality and life experiences. But if you’d been asked this same question yesterday, you might have responded with a slightly different description. Does that mean you are a particular person today but were a different person yesterday? And what about tomorrow? Welcome to the slippery, shape-shifting nature of memory. As Professor Gabrielle Principe reveals, “you” are the conglomeration of the often-unreliable information your brain decides to feed you at any given moment.

Numbers. Like the alphabet, they’re one of the most elementary of concepts learned and memorized at a young age; but outside of figuring out tips and taxes, you probably haven’t given much thought to them since then. To a mathematician, every number has its own unique properties and personality - and when studied, played with, and manipulated, numbers can actually be tons of fun.

Imagine a Museum of Lost Art. If this imaginary museum contained just the artwork we knew was lost— whether from theft, purposeful destruction, vandalism, war, or the forces of nature—it would still contain more masterpieces than those in all the world’s current museums combined. Imagine that! In Lost Art: The Stories of Missing Masterpieces, art historian Noah Charney guides you through just such an imaginary museum. In 12 fascinating lectures, you will hear the stories behind the theft and/or destruction of some of the world’s most famous pieces of art.