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.

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 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.

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 Made in America, Bryson de-mythologizes his native land, explaining how a dusty hamlet with neither woods nor holly became Hollywood, how the Wild West wasn't won, why Americans say 'lootenant' and 'Toosday', how Americans were eating junk food long before the word itself was cooked up, as well as exposing the true origins of the G-string, the original $64,000 question, and Dr Kellogg of cornflakes fame.

The real stories behind the scenery of America’s national parks. For 12 years, Andrea Lankford lived in the biggest, most impressive national parks in the world, working a job she loved. She chaperoned baby sea turtles on their journey to sea. She pursued bad guys on her galloping patrol horse. She jumped into rescue helicopters bound for the heart of the Grand Canyon. She won arguments with bears. She slept with a few too many rattlesnakes. Hell yeah, it was the best job in the world! Fortunately, Andrea survived it.

When she was suddenly given the opportunity of a new life in rural Jutland, journalist and archetypal Londoner Helen Russell discovered a startling statistic: the happiest place on earth isn't Disneyland but Denmark, a land often thought of by foreigners as consisting entirely of long, dark winters, cured herring, Lego and pastries. What is the secret to their success? Are happy Danes born or made?

The “mountain men” were the hunters and trappers who fiercely strode the Rocky Mountains in the early to mid-1800s. They braved the elements in search of the skins of beavers and other wild animals, to sell or barter for goods. The lifestyle of the mountain men could be harsh, existing as they did among animals, and spending most of their days and nights living and camping out in the great unexplored wilds of the Rockies.

In less than a year, Neil Peart lost both his 19-year-old daughter, Selena, and his wife, Jackie. Faced with overwhelming sadness and isolated from the world in his home on the lake, Peart was left without direction. That lack of direction lead him on a 55,000 mile journey by motorcycle across much of North America, down through Mexico to Belize, and back again.

When Edmund Hillary first conquered Mt. Everest, Sherpa Tenzing Norgay was at his side. Indeed, for as long as Westerners have been climbing the Himalaya, Sherpas have been the unsung heroes in the background. In August 2008, when eleven climbers lost their lives on K2, the world’s most dangerous peak, two Sherpas survived. They had emerged from poverty and political turmoil to become two of the most skillful mountaineers on earth. Based on unprecedented access and interviews, Buried in the Sky reveals their astonishing story for the first time.

In Neither Here nor There Bill Bryson brings his unique brand of humour to bear on Europe as he shoulders his backpack, keeps a tight hold on his wallet, and journeys from Hammerfest, the northernmost town on the continent, to Istanbul on the cusp of Asia.

Where's the Next Shelter? is the true story of three travelers on the Appalachian Trail, a 2,000-mile hike that stretches from Georgia to Maine, told from the perspective of Gary Sizer, a seasoned backpacker and former marine who quickly finds himself humbled by the endeavor. If you long for the horizon or to sleep under the stars, then come along for the hike of a lifetime. All you have to do is take the first step.

Vagabonding is about taking time off from your normal life - from six weeks to four months to two years - to discover and experience the world on your own terms. Veteran shoestring traveler Rolf Potts shows how anyone armed with an independent spirit can achieve the dream of extended overseas travel.

For fans of The Lost City of Z, Walking the Amazon, and Turn Right at Machu Picchu comes naturalist and explorer Paul Rosolie’s extraordinary adventure in the uncharted tributaries of the Western Amazon - a tale of discovery that vividly captures the awe, beauty, and isolation of this endangered land and presents an impassioned call to save it.

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.

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.

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.

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 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.

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.

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.

Taught by acclaimed Professor Patrick Allitt, a British-born scholar who teaches at Emory University, these 36 splendid lectures give you an insider’s take on traveling through Great Britain. Whether you are planning a week-long vacation, a month-long grand tour, or just want to experience England, Scotland, and Wales from afar, this immersive course takes you on a voyage through not only the most popular tourist sites but also a trove of “hidden gems” overlooked by the traditional guidebooks.

The Rhine is one of the world's greatest rivers. Once forming the outer frontier of the Roman Empire, it flows 800 miles from the social democratic playground of the Netherlands, through the industrial and political powerhouses of Germany and France, to the wealthy mountain fortresses of Switzerland and Liechtenstein.

In The Great Tours: Experiencing Medieval Europe, award-winning Professor Kenneth R. Bartlett of the University of Toronto invites you to travel through time to the golden ages of 12 of Europe’s most beautiful medieval cities. In 24 lectures, you’ll discover teeming markets and mercantile centers, royal feasts and ritual, dramatic military engagements, magnificent religious pageantry, and the many colorful layers of daily medieval life.

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.

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.

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.

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.

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.