Many Americans remember a family road trip to visit one of our 63 national parks. Why did Americans start preserving these sites of natural and historic interest? How were these parks selected, and what steps did conservationists, activists, philanthropists, politicians, and others take to protect millions of acres against the booming developments of an expanding nation? An award-winning writer, researcher, and American Studies scholar, Dr. Megan Kate Nelson tackles these questions as she takes you on a marvelous journey through some of the most beautiful places on Earth.

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.

Sex. The word makes some people giggle or blush, while others may draw back in discomfort. So, why do we find it so difficult to talk openly about sex? Much of our reticence in discussing and acknowledging the realities of sex comes, at least in part, from a unique time and place: medieval Europe. In the 12 episodes of Sex in the Middle Ages, Professor Jennifer McNabb and a panel of experts in medieval history and literature will take you back to the period between the fall of Rome and the rise of the Renaissance to explore the ideals and realities of sex and sexuality.

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.

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.

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.

During the Great Migration, Black Americans led a mass exodus out of the South. But not all that glittered in the imagination was gold in the real world across the Mason-Dixon line. They contended with dim economic prospects and sparred with white labor unions. They also struggled to assimilate into established Black communities. Nevertheless, these 6 million Black migrants left an indelible mark on life in the United States. How the Great Migration Changed America explores the causes and consequences of the Great Northward Migration in 12 eye-opening lectures.

Spaceflight is notoriously dangerous. Beyond launch mishaps and equipment failures, astronauts face serious health problems from long-term weightlessness and high-energy radiation. Not to mention, the space environment is a near-perfect vacuum that can quickly kill anyone who is unprotected. Drawing on the hard-won insights of NASA astronauts and space researchers, this 12-lecture course presents the perils of spaceflight and what experts have done to make them survivable. It also deals with livability in space, including nutrition, sleep, environmental control, and personal hygiene.

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 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.

Delve into some of the most infamous, ghastly, and mysterious crimes of the last hundred-odd years in Crimes of the Century: A Selective History of Infamy. Taught by Professor Richard B. Spence of the University of Idaho, this enthralling course gives you a dozen case studies of murders most foul. From an intriguing Irish domestic murder to a world-shaking political assassination, this course gives you an inside look at some of the most heinous and maddeningly unknowable crimes in modern history.

“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 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?

Great castles are invaluable historical artifacts, that give us an incredible window into the medieval world. Castles were part of the very fabric of medieval society, and profoundly influenced the political, economic, demographic, and social evolution of Europe. In the 24 compelling lectures of Great Castles of Europe, Professor Victoria L. McAlister, of Towson University guides you through the Middle Ages and into the Renaissance, highlighting outstanding and historically significant castles of these extraordinary times.

Many Americans know that our nation’s founders drew inspiration from the political systems of ancient Rome and Greece. But what exactly were these influences? And did they shape the United States in far-reaching ways? In these 24 compelling lectures, Professor Winterer takes you on a journey into the thought and actions of the American revolutionaries, showing how classical antiquity shaped every aspect of the revolutionary and founding era.

The 13 chapters of The Art of War, each devoted to one aspect of warfare, were compiled by the high-ranking Chinese military general, strategist, and philosopher Sun-Tzu. In spite of its battlefield specificity, The Art of War has found new life in the modern age, with leaders in fields as wide and far-reaching as world politics, human psychology, and corporate strategy finding valuable insight in its timeworn words.

The Mongol army led by Genghis Khan subjugated more lands and people in 25 years than the Romans did in 400. In nearly every country the Mongols conquered, they brought an unprecedented rise in cultural communication, expanded trade, and a blossoming of civilization.

Experience a bold take on this classic autobiography as it’s performed by Oscar-nominated Laurence Fishburne. In this searing classic autobiography, originally published in 1965, Malcolm X, the Muslim leader, firebrand, and Black empowerment activist, tells the extraordinary story of his life and the growth of the Human Rights movement. His fascinating perspective on the lies and limitations of the American dream and the inherent racism in a society that denies its non-White citizens the opportunity to dream, gives extraordinary insight into the most urgent issues of our own time.

Do you know how many wives Zeus had? Or how the famous Trojan War was caused by one beautiful lady? Or how Thor got his hammer? Give your imagination a real treat. This Mega Mythology Collection of eight audiobooks is for you....

The Roman gladiator has long been a figure of fascination. Portrayed frequently in fine art and popular culture alike, the gladiator is both a real part of history and a legend of a romanticized past. We know that these men entertained Roman audiences by fighting in dangerous and often deadly games. But who were the gladiators? What were their lives like? And why do they continue to have such a strong hold on our imagination, centuries after the fall of the Roman Empire?

The 24 revealing lectures of Unsung Heroes of the Ancient World reconstruct over a dozen biographies from the classical world—most of them little-known, some of them quite unlikely heroes. With Professor Emeritus Gregory Aldrete as your expert guide, you will meet the ambitious travel writers, dedicated engineers, careful cartographers, diligent farmers, woman philosophers, devoted wives, skilled military generals, African rebels, Persian kings, and impressive athletes who stood out among their peers centuries ago.

Great castles are invaluable historical artifacts, that give us an incredible window into the medieval world. Castles were part of the very fabric of medieval society, and profoundly influenced the political, economic, demographic, and social evolution of Europe. In the 24 compelling lectures of Great Castles of Europe, Professor Victoria L. McAlister, of Towson University guides you through the Middle Ages and into the Renaissance, highlighting outstanding and historically significant castles of these extraordinary times.

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.

Many Americans know that our nation’s founders drew inspiration from the political systems of ancient Rome and Greece. But what exactly were these influences? And did they shape the United States in far-reaching ways? In these 24 compelling lectures, Professor Winterer takes you on a journey into the thought and actions of the American revolutionaries, showing how classical antiquity shaped every aspect of the revolutionary and founding era.

Embark on a journey to the very beginning of writing as a tool of language and see how the many threads of history and linguistics came together to create the alphabet that forms the foundation of English writing. Your guide is Professor John McWhorter of Columbia University and in the 16 lectures of Ancient Writing and the History of the Alphabet, he will help you navigate the complex linguistic and cultural history behind one of our most crucial tools of communication.

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?

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.

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.

Owing to the legacy of slavery, African Americans have faced significant obstacles to obtaining the fundamental rights of freedom and citizenship. The consistent struggle among African Americans to gain their human rights live at the heart of the American experiment in democracy. In the 24 compelling lectures of African American History: From the African Coast to the Civil War, take a penetrating look at the experience of African Americans in the colonial and antebellum eras

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.

Over the course of 24 in-depth lectures, Professor Emily Graham, an Associate Professor of History at Oklahoma State University, surveys the global history of Christian sainthood. As you’ll discover, the stories of Christian saints are not just fascinating—they’re also an integral part of Christian history.

Sex. The word makes some people giggle or blush, while others may draw back in discomfort. So, why do we find it so difficult to talk openly about sex? Much of our reticence in discussing and acknowledging the realities of sex comes, at least in part, from a unique time and place: medieval Europe. In the 12 episodes of Sex in the Middle Ages, Professor Jennifer McNabb and a panel of experts in medieval history and literature will take you back to the period between the fall of Rome and the rise of the Renaissance to explore the ideals and realities of sex and sexuality.

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.

From the icy front lines of Soviet Russia to the bombing campaigns against Britain to the American submarines lurking beneath the choppy waters of the Pacific, step into the shoes of remarkable everyday men and women in World War II: Up Close and Personal. Your lecturer is Dr. Keith Huxen, a historian and project director at The Henry M. Jackson Foundation, which supports the Defense POW/MIA Accounting Agency.

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.