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.

These 36 lectures tell the remarkable story of a tumultuous thousand-year period in the history of England. Dominated by war, conquest, and the struggle to balance the stability brought by royal power with the rights of the governed, it was a period that put into place the foundation of much of the world we know today. As you journey through this largely chronological narrative you'll see key themes emerge, including the assimilation of successive waves of invaders, the tense relationship between kings and the nobility, and the constant battles over money and taxation.

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.

The Roman Republic is one of the most breathtaking civilizations in world history. Between roughly 500 BCE to the turn of the millennium, a modest city-state developed an innovative system of government and expanded into far-flung territories across Europe, Northern Africa, and the Middle East. This powerful civilization inspired America's founding fathers, gifted us a blueprint for amazing engineering innovations, left a vital trove of myths, and has inspired the human imagination for 2,000 years.

"It doesn't take an Einstein to understand modern physics," says Professor Wolfson at the outset of these 24 lectures on what may be the most important subjects in the universe: relativity and quantum physics. Both have reputations for complexity. But the basic ideas behind them are, in fact, simple and comprehensible by anyone. These dynamic and illuminating lectures begin with a brief overview of theories of physical reality starting with Aristotle and culminating in Newtonian or "classical" physics.

Ancient Egyptian civilization is so grand our minds sometimes have difficulty adjusting to it. It lasted 3,000 years, longer than any other on the planet. Its Great Pyramid of Cheops was the tallest building in the world until well into the 19th century and remains the only Ancient Wonder still standing. And it was the most technologically advanced of the ancient civilizations, with the medical knowledge that made Egyptian physicians the most famous in the world.

Eating is an indispensable human activity. As a result, whether we realize it or not, the drive to obtain food has been a major catalyst across all of history, from prehistoric times to the present. Epicure Jean-Anthelme Brillat-Savarin said it best: "Gastronomy governs the whole life of man."

Every day of your life is spent surrounded by mysteries that involve what appear to be rather ordinary human behaviors. What makes you happy? Where did your personality come from? Why do you have trouble controlling certain behaviors? Why do you behave differently as an adult than you did as an adolescent?Since the start of recorded history, and probably even before, people have been interested in answering questions about why we behave the way we do.

For the past few hundred years, most of what we’ve been taught about the native cultures of North America came from reports authored by the conquerors and colonizers who destroyed them. Now - with the technological advances of modern archaeology and a new perspective on world history - we are finally able to piece together their compelling true stories. In Ancient Civilizations of North America, Professor Edwin Barnhart, Director of the Maya Exploration Center, will open your eyes to a fascinating world you never knew existed - even though you’ve been living right next to it, or even on top of it.

Most of us have a limited understanding of the powerful role economics has played in shaping human civilization. This makes economic history - the study of how civilizations structured their environments to provide food, shelter, and material goods - a vital lens through which to think about how we arrived at our present, globalized moment. Designed to fill a long-empty gap in how we think about modern history, these 48 lectures are a comprehensive journey through more than 600 years of economic history.

Great music is a language unto its own, a means of communication of unmatched beauty and genius. And it has an undeniable power to move us in ways that enrich our lives-provided it is understood.If you have ever longed to appreciate great concert music, to learn its glorious language and share in its sublime pleasures, the way is now open to you, through this series of 48 wonderful lectures designed to make music accessible to everyone who yearns to know it, regardless of prior training or knowledge.

Even today, the influence of Ancient Rome is indelible, with Europe and the world owing this extraordinary empire a huge cultural debt in almost every important category of human endeavor, including art, architecture, engineering, language, literature, law, and religion. At the peak of its power, Rome's span was vast. In the regional, restless, and shifting history of continental Europe, the Roman Empire stands as a towering monument to scale and stability, unified in politics and law, stretching from the sands of Syria to the moors of Scotland. And it stood for almost 700 years.In this series of 48 spirited lectures, you'll see how a small village of shepherds and farmers rose to tower over the civilized world of its day and left a permanent mark on history. In telling Rome's riveting story, Professor Fagan draws on a wealth of primary and secondary sources, including recent historical and archaeological scholarship, to introduce the fascinating tale of Rome's rise and decline, including the famous events and personalities that have become so familiar: . Horatius at the bridge . Hannibal crossing the Alps during Rome's life-or-death war with Carthage . Caesar assassinated before a statue of his archrival Pompey . The doomed lovers Antony and Cleopatra . The mad and venal emperors Nero and Caligula . The conversion of Constantine The course also addresses one of history's greatest questions: Why did the Roman Empire fall? And you'll learn why most modern scholars believe that the empire did not "fall" at all, but, rather, changed into something very different-the less urbanized, more rural, early medieval world.

One of the most complicated and advanced computers on Earth can't be purchased in any store. This astonishing device, responsible for storing and retrieving vast quantities of information that can be accessed at a moment's notice, is the human brain. How does such a dynamic and powerful machine make memories, learn a language, and remember how to drive a car? What habits can we adopt in order to learn more effectively throughout our lives? The answers to these questions are merely the tip of the iceberg in The Learning Brain.

As raiders and explorers, the Vikings played a decisive role in the formation of Latin Christendom, and particularly of western Europe. Now, in a series of 36 vivid lectures by an honored teacher and classical scholar, you have the opportunity to understand this remarkable race as never before, studying the Vikings not only as warriors, but in all of the other roles in which they were equally extraordinary - merchants, artists, kings, raiders, seafarers, shipbuilders, and creators of a remarkable literature of myths and sagas.

Throughout history, military engagements have altered the course of historical events. In these 36 dynamic lectures, Professor Aldrete leads you in discovering the military conflicts that have had the greatest impact in shifting the direction of events and defining our world. Across 4,000 years of history, you'll explore nearly 40 key military engagements, from the milestone battles of Western civilization to their counterparts in the Middle East, India, and Asia.

Everything we now know about the universe - from the behavior of quarks to the birth of galaxies - has come from people who've been willing to ponder the unanswerable. And with the advent of modern science, great minds have turned to testing and experimentation rather than mere thought as a way of grappling with some of the universe's most vexing dilemmas. So what is our latest picture of some of the most inexplicable features of the universe? What still remains to be uncovered and explored by today's scientists?

From evoking a scene to charting a plot to revising your drafts, Writing Great Fiction: Storytelling Tips and Techniques offers a master class in storytelling. Taught by award-winning novelist James Hynes, a former visiting professor at the famed Iowa Writers' Workshop, these 24 insightful lectures show you the ins and outs of the fiction writer's craft.

Meditation offers deep and lasting benefits for mental functioning and emotional health, as well as for physical health and well-being. These 24 detailed lectures teach you the principles and techniques of sitting meditation, the related practice of walking meditation, and the highly beneficial use of meditative awareness in many important activities, including eating and driving. You will also learn how to use the skills of meditation in working with thoughts and emotional states.

In Your Best Brain, Professor John J. Medina - an award-winning scientist, New York Times best-selling author, and leading advocate for brain research - delivers 24 exciting lectures that probe the origins of consciousness, memory, emotion, attention, intelligence, and beyond. He focuses on five key areas of study in neuroscience: the brain’s physical structure and function, and how it enabled us to become the planet’s apex predator.

The course is organized around a mnemonic device, developed by Professor Freeman, that can serve in any negotiation situation. Called "I FORESAW IT," this indispensable framework guides you in assembling the strongest possible case, showing you how to evaluate such factors as creative options, independent criteria, and your best alternative to a negotiated agreement.

As raiders and explorers, the Vikings played a decisive role in the formation of Latin Christendom, and particularly of western Europe. Now, in a series of 36 vivid lectures by an honored teacher and classical scholar, you have the opportunity to understand this remarkable race as never before, studying the Vikings not only as warriors, but in all of the other roles in which they were equally extraordinary - merchants, artists, kings, raiders, seafarers, shipbuilders, and creators of a remarkable literature of myths and sagas.

Ancient Egyptian civilization is so grand our minds sometimes have difficulty adjusting to it. It lasted 3,000 years, longer than any other on the planet. Its Great Pyramid of Cheops was the tallest building in the world until well into the 19th century and remains the only Ancient Wonder still standing. And it was the most technologically advanced of the ancient civilizations, with the medical knowledge that made Egyptian physicians the most famous in the world.

To take a skeptical approach to American history is not to dabble in imaginative conspiracy theories; rather, it's to reframe your understanding of this great nation's past and actually strengthen your appreciation for what makes American history such a fascinating chapter in the larger story of Western civilization. And in this bold 24-lecture series, you can do just that.

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.

Great music is a language unto its own, a means of communication of unmatched beauty and genius. And it has an undeniable power to move us in ways that enrich our lives-provided it is understood.If you have ever longed to appreciate great concert music, to learn its glorious language and share in its sublime pleasures, the way is now open to you, through this series of 48 wonderful lectures designed to make music accessible to everyone who yearns to know it, regardless of prior training or knowledge.

Eating is an indispensable human activity. As a result, whether we realize it or not, the drive to obtain food has been a major catalyst across all of history, from prehistoric times to the present. Epicure Jean-Anthelme Brillat-Savarin said it best: "Gastronomy governs the whole life of man."

"It doesn't take an Einstein to understand modern physics," says Professor Wolfson at the outset of these 24 lectures on what may be the most important subjects in the universe: relativity and quantum physics. Both have reputations for complexity. But the basic ideas behind them are, in fact, simple and comprehensible by anyone. These dynamic and illuminating lectures begin with a brief overview of theories of physical reality starting with Aristotle and culminating in Newtonian or "classical" physics.