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Language defines us as a species, placing humans head and shoulders above even the most proficient animal communicators. But it also beguiles us with its endless mysteries, allowing us to ponder why different languages emerged, why there isn't simply a single language, how languages change over time and whether that's good or bad, and how languages die out and become extinct.

Hidden treasures. Secret societies. War and plunder. You’ve heard the stories, seen the movies, pondered the conspiracy theories. You know that the Knights Templar are said to be connected with the Holy Grail, the Ark of the Covenant, the Freemasons—even Oak Island, off the coast of Nova Scotia. But who were they really?

"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. After that, you'll follow along as Professor Wolfson outlines the logic that led to Einstein's profound theory of special relativity and the simple yet far-reaching insight on which it rests. With that insight in mind, you'll move on to consider Einstein's theory of general relativity and its interpretation of gravitation in terms of the curvature of space and time.From there, you'll embark on a dazzling exploration of how inquiry into matter at the atomic and subatomic scales led to quandaries that are resolved-or at least clarified-by quantum mechanics, a vision of physical reality so profound and so at odds with our experience that it nearly defies language.By bringing relativity and quantum mechanics into the same picture, you'll chart the development of fascinating hypotheses about the origin, development, and possible futures of the entire universe, as well as the possibility that physics can produce a "theory of everything" to account for all aspects of the physical world. But the goal throughout these lectures remains the same: to present the key ideas of modern physics in a way that makes them clear to the interested layperson.

For more than 1,500 years, the literature of Great Britain has taught, nurtured, thrilled, outraged, and humbled readers both inside and outside its borders.Chaucer, Shakespeare, Dickens, Austen, Swift, Conrad, Wilde-the roster of powerful British writers is remarkable. More important, Britain's writers have long challenged readers with new ways of understanding an ever-changing world.This series of 48 fascinating lectures by an award-winning professor.

Grasp the important ideas that have served as the backbone of philosophy across the ages with this extraordinary 60-lecture series. This is your opportunity to explore the enormous range of philosophical perspectives and ponder the most important and enduring of human questions-without spending your life poring over dense philosophical texts.

Western art, with its lineage from the ancient world to the present, has given us works of genius by the likes of Phidias, Michelangelo, Leonardo, Rembrandt, Vermeer, Monet, Van Gogh, and many more. In the 25 engrossing lectures of Understanding Western Art: Stories, Styles, and Masterworks, you’ll explore the larger themes, principles, and expressive currents that tell the story of Western art, and which shed light on its deeper meanings.

From the first centuries CE to the present, the question of who wrote the Bible has fascinated readers, theologians, and scholars. While countless viewpoints have circulated, the matter of who wrote the Bible remains a compelling issue. In these 24 eye-opening lectures, Professor Baden takes you deeply into the history of both the Hebrew Bible and the New Testament.

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.

In The Pagan World: Ancient Religions Before Christianity, you will meet the fascinating, ancient polytheistic peoples of the Mediterranean and beyond, their many gods and goddesses, and their public and private worship practices, as you come to appreciate the foundational role religion played in their lives. Professor Hans-Friedrich Mueller, of Union College in Schenectady, New York, makes this ancient world come alive in 24 lectures with captivating stories of intrigue, artifacts, illustrations, and detailed descriptions from primary sources of intriguing personalities.

Most people picture archaeologists digging through dirt in search of ancient artifacts and lost cities. And sometimes that’s exactly right—as at the mound of Troy, where excavations suggest there may be truth behind Homer’s tales. But archaeology is much more than excavation. It blends science, history, and detective work, using tools like CT scans, astronomical modeling, and even cryptographic analysis to solve puzzles from across the ages.

What happened before the Big Bang? Why does time flow only forward? Do we live as part of a multiverse? Could the universe vanish in an instant? These questions and more are at the forefront of physics, cosmology, and quantum theory, and they keep some of the best minds of modern physicists awake at night. The Great Unanswered Questions of Physics gives you the chance to probe these mysteries of the universe.

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.

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.

The story of our world and the different living things that have populated it is an amazing epic with millions of species, exotic settings, planet-wide cataclysms, and surprising plot twists. These 36 lectures tell the all-embracing story of life on Earth - its origins, extinctions, and evolutions - in a manner that assumes no background in science. At half an hour per lecture, you’ll cover the entire 4.54-billion-year history of Earth in 18 hours, averaging 70,000 years per second!

In Understanding Artificial Intelligence: Of Minds and Machines, philosopher Patrick Grim traces the story of AI from ancient legends to the neural networks behind today’s breakthroughs. You see how modern systems became so powerful so quickly. You also explore the very meaning of “intelligence,” discovering how modern AI succeeds by drawing on three resources: vast datasets that let systems learn from examples; deep-learning architectures loosely modeled on the brain’s layers; and feedback loops that help models refine their behavior.

The Great Villains of History takes you into the riveting world of charisma and crime, evil and opportunity, ambition and bloodshed. Taught by esteemed Dr. Richard B. Spence, Professor Emeritus of History at the University of Idaho, these 24 lectures tell the stories of more than 70 villains from Ancient Rome to Jeffrey Epstein, exploring not just what they did, but why they did it—and what their choices reveal about the darkest corners of the human heart.

In a field known for startling ideas, the Many-Worlds Interpretation (MWI) of quantum mechanics may take the prize. It holds that parallel to our own world are a large number of other universes, almost identical to ours but with small variations. Copies of each of us inhabit a myriad of these worlds. But they are not us exactly; they share our past history, but they are different people who have unique futures. Although these realms are invisible and can’t communicate with each other, prominent physicists are convinced they must exist.

Most people think the way to write a best seller is to have a lot of talent and even more luck. As you will learn, there is a recipe for success, and luck may be the least important ingredient in creating a best seller. No one has cracked the code better than James Scott Bell. A best-selling author himself, and the author of the number-one best seller for writers, Plot & Structure, Mr. Bell has been teaching the principles of best-selling fiction for over 20 years, principles that apply to any genre or style.

In this 24-lesson course aimed at non-scientists, noted particle physicist Dr. Don Lincoln of Fermi National Accelerator Laboratory covers more than a century of progress in physics, describing exactly how scientists reach the conclusions they do. He starts with the atom, which was long hypothesized but wasn’t definitively proven until a paper by Albert Einstein in 1905. That was just the beginning, as researchers probed ever deeper into the atom’s complex structure, leading to the weird findings of quantum mechanics.