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.

Grammar! For many of us, the word triggers memories of finger-wagging schoolteachers, and of wrestling with the ambiguous and complicated rules of using formal language. But what is grammar? In fact, it's the integral basis of how we speak and write. As such, a refined awareness of grammar opens a world of possibilities for both your pleasure in the English language and your skill in using it, in both speech and the written word.

Jazz is a uniquely American art form, one of America's great contributions to not only musical culture, but world culture, with each generation of musicians applying new levels of creativity that take the music in unexpected directions that defy definition, category, and stagnation. Now you can learn the basics and history of this intoxicating genre in an eight-lecture series that is as free-flowing and original as the art form itself.

Education can be enriching and transformative. It can also be downright excruciating—even demoralizing. When it comes to learning, why are some of us lovers and some of us haters? Welcome to the world of educational psychology, which uses science to explore what causes people to engage and learn, and what we can do to make learning opportunities more enjoyable and impactful. Spoiler alert: Teachers can only do so much. Students, too, must take control of their learning. Unfortunately, many of us never, ahem, learned the skills to do just that.

Trick I - The first thing to vanish is a worthless doorstop. Then, in the twinkling of an eye, goes its rich and elderly owner. And, for the grand finale, both reappear - each as dead as the other. Trick II - From the House of Darkness issues more bafflement. In total darkness and from a distance of 12 feet, four bullets are pumped within an inch of each other into a spectator's back - a feat utterly impossible to perform yet brazenly and undeniably done.

Distressed by his father's death and his mother's over-hasty remarriage, Hamlet, Prince of Denmark, is faced by a specter from beyond the grave bearing a grim message of murder and revenge. The young prince is driven to the edge of madness by his struggle to understand the situation he finds himself in and to do his duty. Many others, including Hamlet's beloved, the innocent Ophelia, are swept up in his tragedy.

The brave warrior Macbeth allows himself to be persuaded by Lady Macbeth, his wife, to slay good King Duncan and seize the throne of Scotland for himself. Macbeth achieves his ambition, but one murder proves not to be enough as he desperately attempts to eliminate all who might threaten his ill-gotten power. Descending into paranoia, Macbeth achieves his ambition but ravages his soul.

What can we still learn from C.S. Lewis? Find out in these 12 insightful lectures that cover the author's spiritual autobiography, novels, and his scholarly writings that reflect on pain and grief, love and friendship, prophecy and miracles, and education and mythology.

Words. We use them all the time, every day, mostly without giving them much thought at all. We take for granted that they’re here at our disposal whenever we need them. But if you’ve ever wished you could communicate more effectively, words are the place to start. It’s incumbent upon you to choose the best words to accomplish your goals, because how you choose to communicate influences—well, everything! The power of communication shapes our professional goals, our relationships, and our lives—so the words we choose to use carry a great deal of power.

What is our species' greatest invention? Medicine, computers, space travel? Not even close. The innovation that underlies each of our past achievements and those we still aspire to is language. Language is the ultimate invention of Homo sapiens - one that has allowed us to change the physical and social world around us in every conceivable way, and an invention that has fundamentally changed us, as well.