The Vikings evoke striking images of horned helmets, battle axes, and merciless coastal raids. Remembered for their shocking brutality and impressive naval prowess, these marauding pirates from the North have inspired poetry, fantasy novels, plays, symphonies, and even comic book heroes over the last 12 centuries. But do any of these enduring tropes reflect reality? Who were the Vikings really? What do we know about the period that bears their name? Explore these questions and more in The Viking Age, a 12-lecture course that corrects the record on a transformative period in world history.

The Middle Ages was a time of major historical shifts and transformations. This amazing era reverberates with discoveries, innovations, events, and historical processes that are integral to the world we know now. In these 24 enthralling lectures, Professor Salisbury leads you on a sumptuous tour of this incredible historical epoch, making clear that the remarkable historical currents and advances of the Middle Ages unfolded not only in the West, but across the globe, from Europe, Africa, and the Middle East to Asia, the Americas, and beyond.

Look beyond the abstract dates and figures, kings and queens, and battles and wars that make up so many historical accounts. Over the course of 48 richly detailed lectures, Professor Garland covers the breadth and depth of human history from the perspective of the so-called ordinary people, from its earliest beginnings through the Middle Ages.

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.

From the 17th to 18th centuries, bold thinkers cast off the authority of ancient traditions and embraced reason as the primary tool for understanding the world. These rationalists, or early modern philosophers, included René Descartes, Baruch Spinoza, and Gottfried Wilhelm Leibniz—visionaries whose answers to profound questions remain relevant today. Early Modern Philosophy: Descartes and the Rationalists covers the key philosophers of this period in 12 fascinating half-hour lectures, presented by award-winning teacher James D. Reid, Professor of Philosophy at Metropolitan State University.

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.

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.

While it’s easy to get caught up - and, rightfully so - in the art of the Renaissance, you cannot have a full, rounded understanding of just how important these centuries were without digging beneath the surface, without investigating the period in terms of its politics, its spirituality, its philosophies, its economics, and its societies. Do just that with these 48 lectures that consider the European Renaissance from all sides, that disturb traditional understandings, that tip sacred cows, and that enlarges our understanding of how the Renaissance revolutionized the Western world.

How did communism become such a pervasive economic and political philosophy? Why did it first take root in early 20th-century Russia? These and other questions are part of a fascinating story whose drama has few equals in terms of sheer scale, scope, or human suffering and belief. These 12 lectures invite you to go inside communism’s journey from a collection of political and economic theories to a revolutionary movement that rocked the world.

Noted Japan expert Professor Mark J. Ravina of the University of Texas at Austin covers the politics, economics, and culture of the island nation since World War II - a conflict that saw the end of Japan’s dream of regional conquest, which Professor Ravina calls Empire 1.0. The country’s postwar leaders radically changed course, renouncing a strong military to pursue Empire 2.0 - Japan as an economic colossus.

England: From the Fall of Rome to the Norman Conquest takes you through the mists of time to the rugged landscape of the British Isles. Over the course of 24 sweeping lectures, Professor Jennifer Paxton of The Catholic University of America surveys the forging of a great nation from a series of warring kingdoms and migrating peoples. From Germanic tribes to Viking invasions to Irish missionaries, she brings to life an underexamined time and place.

Right this minute, your body is carrying roughly 38 trillion microbial cells along with it—and in the vast majority of cases, you couldn’t live without them. On top of that, you harbor around 380 trillion viruses, most of which are either beneficial or benign. The Hidden Power of Microbes draws back the curtain on this vast microworld in 24 half-hour lectures delivered by acclaimed science communicator Dr. Melissa Booth, research scientist, professor, and Founder and Principal of The Science Communicator, devoted to training scientists to tell accurate, compelling stories about their fields.

The history of the Constitution is therefore a history of ideas that define our country and our national identity—and it’s a fascinating and revealing story. The US Constitution Through History gives you the opportunity to explore the story of this powerful document, as well as the way our interpretation of it has evolved. In 24 riveting lectures, Professor Eric Berger of the University of Nebraska takes you on a journey through America’s constitutional history. He takes you inside the minds of the Framers and unpacks the ideas that led to the break from England.

Thor, Odin, Loki, Freyja, the Valkyries, Valhalla, Ragnarok — many of the places we encounter these and other names, places, and events from Norse mythology in daily life and pop culture are connected to the medieval sources in name only.

The Vikings evoke striking images of horned helmets, battle axes, and merciless coastal raids. Remembered for their shocking brutality and impressive naval prowess, these marauding pirates from the North have inspired poetry, fantasy novels, plays, symphonies, and even comic book heroes over the last 12 centuries. But do any of these enduring tropes reflect reality? Who were the Vikings really? What do we know about the period that bears their name? Explore these questions and more in The Viking Age, a 12-lecture course that corrects the record on a transformative period in world history.

From the 17th to 18th centuries, bold thinkers cast off the authority of ancient traditions and embraced reason as the primary tool for understanding the world. These rationalists, or early modern philosophers, included René Descartes, Baruch Spinoza, and Gottfried Wilhelm Leibniz—visionaries whose answers to profound questions remain relevant today. Early Modern Philosophy: Descartes and the Rationalists covers the key philosophers of this period in 12 fascinating half-hour lectures, presented by award-winning teacher James D. Reid, Professor of Philosophy at Metropolitan State University.

The Middle Ages was a time of major historical shifts and transformations. This amazing era reverberates with discoveries, innovations, events, and historical processes that are integral to the world we know now. In these 24 enthralling lectures, Professor Salisbury leads you on a sumptuous tour of this incredible historical epoch, making clear that the remarkable historical currents and advances of the Middle Ages unfolded not only in the West, but across the globe, from Europe, Africa, and the Middle East to Asia, the Americas, and beyond.

Economic forces are everywhere around you. But that doesn't mean you need to passively accept whatever outcome those forces might press upon you. Instead, with these 12 fast-moving and crystal clear lectures, you can learn how to use a small handful of basic nuts-and-bolts principles to turn those same forces to your own advantage.

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.

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.

In Forgotten America: Rediscovering Events that Changed the Nation, turn your attention to the unfamiliar in United States history with historian and author Dr. Rachel Michelle Gunter.

The work of archaeology uncovers fascinating vestiges of humanity’s past, greatly enriching our knowledge of our ancestors and ourselves. Over the last century, archaeologists have increasingly ventured underwater, making spellbinding finds and opening an incredible new frontier for archaeological discovery. In the 12 delightful and eye-opening lectures of Underwater Archaeology: Mysteries of the Deep, Professor Lemke, an expert underwater archaeologist working in the field, invites you to discover astonishing treasures of history that lie beneath the waves.

Look beyond the abstract dates and figures, kings and queens, and battles and wars that make up so many historical accounts. Over the course of 48 richly detailed lectures, Professor Garland covers the breadth and depth of human history from the perspective of the so-called ordinary people, from its earliest beginnings through the Middle Ages.

Right this minute, your body is carrying roughly 38 trillion microbial cells along with it—and in the vast majority of cases, you couldn’t live without them. On top of that, you harbor around 380 trillion viruses, most of which are either beneficial or benign. The Hidden Power of Microbes draws back the curtain on this vast microworld in 24 half-hour lectures delivered by acclaimed science communicator Dr. Melissa Booth, research scientist, professor, and Founder and Principal of The Science Communicator, devoted to training scientists to tell accurate, compelling stories about their fields.

The Roman empire was like no other. Stretching from the north of Britain to the Sahara, and from the Atlantic coast to the Euphrates, it imposed peace and prosperity on an unprecedented scale. Its only true rival lay in the east, where the Parthian and then Persian empires ruled over great cities and the trade routes to mysterious lands beyond. Tracing seven centuries of conflict between Rome and Persia, historian Adrian Goldsworthy shows how these two great powers evolved together

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.

England: From the Fall of Rome to the Norman Conquest takes you through the mists of time to the rugged landscape of the British Isles. Over the course of 24 sweeping lectures, Professor Jennifer Paxton of The Catholic University of America surveys the forging of a great nation from a series of warring kingdoms and migrating peoples. From Germanic tribes to Viking invasions to Irish missionaries, she brings to life an underexamined time and place.

Humans have been on a remarkable journey these past 300,000 years. We started in Africa and slowly spread across the globe—crossing land bridges, sailing into the unknown, and eventually building cities and civilizations. While our primate cousins stayed where they evolved, we moved. Migration isn’t just something we did—it’s a defining trait of our species. Now, after covering the planet, we’re on the move again—not chasing new frontiers, but escaping rising seas, extreme heat, political instability, and economic stress.

With this exciting and historically rich six-lecture course, experience for yourself the drama of this dynamic year in medieval history, centered on the landmark Norman Conquest. Taking you from the shores of Scandinavia and France to the battlefields of the English countryside, these lectures will plunge you into a world of fierce Viking warriors, powerful noble families, politically charged marriages, tense succession crises, epic military invasions, and much more.