No skill is more important in today's world than being able to think about, understand, and act on information in an effective and responsible way. What's more, at no point in human history have we had access to so much information, with such relative ease, as we do in the 21st century. But because misinformation out there has increased as well, critical thinking is more important than ever. These 24 rewarding lectures equip you with the knowledge and techniques you need to become a savvier, sharper critical thinker in your professional and personal life.

Deep in the swampy heart of ancient Mexico, the Olmecs built a grand and influential civilization between 1800 and 400 BCE. The archaeological remains raise more questions than answers about the origins and legacy of this captivating Mesoamerican culture. How did the Olmecs carve and carry their famous colossal heads? Why did they live in flood-prone wetlands when better agricultural land was available? What are the secrets of their written language, and how can we unlock them?

There’s an apocryphal story that Alexander the Great once captured a notorious pirate named Diomedes. The great conqueror decided to interview the doomed pirate, asking him what he thought gave him the right to seize the property of other people. The pirate responded by asking the emperor what he thought gave him the right to take property that doesn’t belong to him, including entire countries. The story goes that Alexander thought the pirate very clever, granting him freedom instead of execution.

Though perhaps less well-known today than the great empires that surrounded them, the historic peoples of Central Asia—such as the Scythians, the Sogdians, the Xiongnu nomads of Mongolia, the Turkic peoples, and many others—produced cultures of major significance. In the 24 lectures of Crossroads of Civilization: A History of Central Asia, taught by Professor Eren Tasar, you will embark on a wide-ranging journey into the majestic landscapes, steppe and desert cultures, resplendent cities, and epic conquests that characterized this mysterious part of the world.

At the end of his career, Albert Einstein was pursuing a dream far more ambitious than the theory of relativity. He was trying to find an equation that explained all physical reality - a theory of everything. Experimental physicist and award-winning educator Dr. Don Lincoln takes you on this exciting journey in The Theory of Everything: The Quest to Explain All Reality. Suitable for the intellectually curious at all levels and assuming no background beyond basic high-school math, these 24 half-hour lectures cover recent developments at the forefront of particle physics and cosmology.

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.

"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.

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."

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.

Whether you want to write your own scripts or simply gain a deeper appreciation for the great stories you see unfold on the screen, Professor Angus Fletcher is here to show you the way in Screenwriting 101: Mastering the Art of Story. Professor Fletcher, Professor of English and Film at The Ohio State University, brings both a personal and scholarly perspective to this craft. As a screenwriter himself, he has experienced the ins and outs of the process first-hand.

The final novel of one of America’s most beloved writers—a tale of degeneration, corruption, and spiritual crisis A Penguin Classic In awarding John Steinbeck the 1962 Nobel Prize in Literature, the Nobel committee stated that with The Winter of Our Discontent, he had “resumed his position...

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.

Author of the New York Times best seller The Beginning of Infinity, David Deutsch, explores the four most fundamental strands of human knowledge: quantum physics, and the theories of knowledge, computation, and evolution - and their unexpected connections. Taken together, these four strands reveal a deeply integrated, rational, and optimistic worldview. It describes a unified fabric of reality that is objective and comprehensible, in which human action and thought are central.

Dr. Catherine Kleier invites us to open our eyes to the phenomenal world of plant life and to the process she calls “Natura Revelata”, the joy of celebrating and learning from the secrets of nature. As Dr. Kleier shares her knowledge with contagious excitement for her subject, she emphasizes the middle ground: Instead of focusing on cell microbiology or the study of ecosystems and habitats, she stresses the basic biology, function, and the amazing adaptations of the plants we see all around us.