By studying the physical astronomy of all the planets in the Solar System, we can attempt to understand their true nature. Ultimately, these lectures will bring us to a greater understanding of the Solar System's creation, which brings us again back to the beginning and what it means to us as we look outward from our rotating Earth.

    You learn the points of view your teachers provide, the perspectives that books offer, and the conclusions you draw yourself based on the facts you were given. Hearing different angles on historical events gives you a more insightful, more accurate, and more rewarding understanding of events – especially when a new viewpoint challenges the story you thought you knew.

    Lowly born, he rose to prominence as he spread his vision of the redemption of the world. He attracted the attention of faithful disciples and suspicious local authorities. Eventually, he was tried, convicted, and executed.Today, his story is known the world over. And yet, more than two millennia later, great thinkers and everyday people still struggle to answer a single question: Who is Jesus? * Was he a wise sage who culled powerful teachings from centuries of Jewish tradition to create a new world vision of peace and love? * Or was he indeed God himself, the embodiment of divinity on earth, sent to bring salvation and redemption from sin? * Did his promise of salvation apply to all humankind or was it limited to only a few followers? And how could one participate in that promise?Since the earliest days of the faith, questions like these have been at the heart of Christianity. Over the centuries, they have led to fierce debate and produced deep divisions among the faithful. These questions have driven profound acts of faith and worship and incited war and persecution. They have contributed to the building of nations and the shaping of lives and have deeply influenced some of the greatest thinkers of Western philosophy. To ponder questions like these is to understand the very shape of the Western world and to comprehend the remarkable power Christian faith has in the life of believers.Now, in The History of Christian Theology, you have an opportunity to explore these profound questions and the many responses believers, scholars, and theologians have developed over more than 2,000 years. Through this 36-lecture course, award-winning Professor Phillip Cary of Eastern University reveals the enduring power of the Christian tradition—as both an intellectual discipline and a spiritual path.Through this course, you will gain thought-provoking insights into a set of teachings that changed the world and discover how, by learning about the diverse beliefs and practices within the wider Christian community, you can enrich your own experience of this great faith.

    

    Thomas Madden is a professor of medieval history at Saint Louis University.As late as 1518, plans were laid by Pope Leo X and the monarchs of Europe to set aside their internal quarrels and once more embark on a holy crusade to wrest the Middle East from the Ottoman Turks. Finding accord and even enthusiasm for the enterprise, all was on course for a multiyear military campaign to push east from North Africa through Egypt and south through the Balkans to squeeze the Turks in a pincer movement and finally oust the Muslims from the Holy Land. The great plan, however, died when Europe was once again plunged into internal strife with the death of Holy Roman Emperor Maximilian I, who had been a leader for the crusade.Even this event in conjunction with the beginnings of the Protestant Reformation, the rise of ever-stronger Ottoman leaders, and the political conflicts throughout Europe did not completely erase the idea of crusading. Today, the military orders of the Teutonic Knights and the Knights Hospitallers continue to care for the poor and the sick, albeit without raising armies to fight.For over 400 years, crusaders (“those signed by the cross”), out of Christian zeal, a declared love for their fellow man, and, in many cases, a simple desire for fortune, glory, and heavenly reward, marched to the Holy Land to battle both a real and perceived threat to their way of life and their religious beliefs. The story of the many crusades are filled with an unremitting passion to keep or return the home of Christianity to Christians. It is also filled with death, destruction, disorder, greed, avarice, and self-interest on all sides. Much of what occurred during the Crusades has come down to us today in the form of continued suspicion among religious ideologies—not only between Christians and Muslims, but also internally among Christian sects and, to some degree, among Muslim sects. There is certainly much to learn about our own history from a better understanding of the Crusades and what led so many to crusade. Course SyllabusLecture 1 The Medieval Background of the CrusadesLecture 2 Islam: Faith, Culture, EmpireLecture 3 Pope Urban II and the Calling of the First CrusadeLecture 4 The First CrusadeLecture 5 What Were the Crusades? Who Were the Crusaders?Lecture 6 The Latin Kingdom of JerusalemLecture 7 The Second CrusadeLecture 8 The Third CrusadeLecture 9 The Fourth CrusadeLecture 10 Crusades in EuropeLecture 11 The Fifth CrusadeLecture 12 The Crusades of St. LouisLecture 13 The Fall of the Crusader StatesLecture 14 Later Crusades and the Legacy of the Crusades

    Indeed, it may be the biggest question of all - at once profound and universal, but also deeply personal. We want to understand the world in which we live, but we also want to understand how to make our own lives as meaningful as possible; to know not only why we're living, but that we're doing it with intention, purpose, and ethical commitment. But how, exactly, do we find that meaning, and develop that commitment? How can we grasp why we are here? Or how we should proceed? And to whom, exactly, we should listen as we shape the path we will walk? This comprehensive 36-lecture series from a much-honored scholar is an invigorating way to begin or continue your pursuit of these questions, and it requires no previous background in philosophical or religious thought. It offers a rigorous and wide-ranging exploration of what various spiritual, religious, and philosophical traditions from both the East and West have contributed to this profound line of questioning, sharing insights from sources that include ancient Indian texts, such as: The Bhagavad-Gita Foundational Chinese texts like the Daodejing and the Chuang Tzu Classical Western texts, such as Aristotle's Nichomachean Ethics and Marcus Aurelius's Meditations Modern philosophers and writers like David Hume, Immanuel Kant, Friedrich Nietzsche, and Leo Tolstoy the unique perspectives offered by Native Americans, in this case, the Lakota Sioux medicine man and writer, John Lame Deer More recent and contemporary philosophers, such as Mohandas Gandhi and the Dalai Lama

    In his gripping and controversial new work, New York Times bestselling author Steven Pinker shows that despite the ceaseless news about war, crime, and terrorism, violence has actually been in decline over long stretches of history. Exploding myths about humankind's inherent violence and the curse of modernity, this ambitious book continues Pinker's exploration of the essence of human nature, mixing psychology and history to provide a remarkable picture of an increasingly enlightened world.

    Central to many spiritual and philosophical traditions and known in English as "meditation," these practices are considered a major means for enhanced awareness and self-mastery. In recent decades, modern science has dramatically confirmed what advanced meditators have long claimed—that meditation, correctly practiced, offers deep and lasting benefits for mental functioning and emotional health, as well as for physical health and well-being.

    Almost daily, researchers are recovering lost information that corrects our picture of what had been a misunderstood era. As a result, we know more than ever about the roles women played in medieval life.       What did it mean to be a heroine in the medieval world? As the four subjects of this course make clear, it meant shaping and changing that world. In the monasteries and churches where people prayed, the universities where they wrote and thought, and even on the political map of Europe itself, these women made differences perceived not only in our time, but in theirs. Women of Intellect, Words, and Passion        These lectures are an extraordinary opportunity to study great women of the past in their own words. Professor Wheeler bases her discussions on recently discovered or recovered written records they left behind, from Hildegard's prodigious scholarship to the personal letters of Heloise and detailed transcripts of Joan of Arc's trial.       With these documents as a basis, you will see Heloise (1101-1163) as a forerunner of Europe's new day. Her letters passionately overflow with the new knowledge of her day. With her star-crossed love, Abelard, she invented a new mode of philosophic thought.       Only now are scholars recovering the long, important second half of the story of Heloise as a woman of power after Abelard's death. Her letters show her to be well versed on such topics as Cicero, classical philosophy, Latin poetry, and rhetoric.       She saw the institution of marriage in her day as little more than a commercial transaction, and its duties burdensome, noisy, costly, and dirty. Her letters reveal her desire to be Abelard's "meretrix" (prostitute) rather than his "imperatrix" (empress). In her discussions on Heloise, Professor Wheeler also covers the long debate as to whether Abelard and Heloise's letters to one anotherthe first, first-person record of a love affair in human history are genuine or not.       Hildegard of Bingen, like Heloise a 12th-century abbess, is revealed as the last flowering of antique learning. She lived a dramatic life as a mystic, voluminous writer, and preacher. She was a personal advisor to Emperor Frederick Barbarossa, and her political involvement and passion as an advocate for clerical and imperial reform give her special interest in our day.       Only in the last generation have scholars rediscovered this amazing medieval intellect. Based on her letters, at least four popes and 10 archbishops corresponded with her, not to mention some 100 other individuals notable to history.Among her many writings, her Book of Simple Medicine was an impressive mini-encyclopedia on what we today would call the natural sciences.       But Hildegard is also known as the "holy hypochondriac," subject to disabling migraines. Were her visions delusions, a result of brainstorms caused by chemical imbalances? Women of Action and Legend        Eleanor of Aquitaine (1124-1204), Queen of France and then England, mother of at least 10 children, scandalized her contemporaries and has fascinated us ever since. She accompanied her husband, Louis VII, on the second Crusade, and her exploits are a reminder that women were crusaders not merely camp followers in numbers that rivaled those of men.       You will learnbased on as-yet-unpublished research by Professor Andrew Lewis that Eleanor was probably born in 1124, not 1122 as normally thought. As a physically hearty woman of courage, she provides a way for historians to explore the diverse roles that women played in enabling or resisting the Crusades. This is exciting work that will allow us to understand medieval women outside the context of home and family as agents of sometimes-radical change.       Eleanor's life is so amazing that it is easy to see why she has become the staple of legends. Among those you will consider are whether she passionately adored, then fought endlessly with, her second husband, Henry II of England (all too true); whether she poisoned Henry's mistress, Rosamund (no proof); and whether she held "courts of love" to encourage and engage in amatory liaisons (again, unproven).       Joan of Arc (1412-1431) was the illiterate French peasant girl whom Mark Twain described as the "youngest person of either sex to lead her nation's army before the age of 19." Known as La Pucelle " (the "maid" or "virgin"), she lacked any kind of military training, yet her military instincts seemed impeccable. Although she carried a sword in battle, she never used it to kill a man, and seems never to have become used to the sight of dead or dying men.Was this young woman who heard heavenly voices an incomprehensible quirk, or did she change the course of European and world history? Ironically, this debate is complicated by the detailed transcripts of her trials, which make her one of the best-documented figures of pre-modern times.       Trial records and her letters reveal her as someone who spoke with "compelling simplicity, quick wit, and piercing honesty." This girl spoke terribly well," said Albert d'Ourches. "I would really like to have had so fine a daughter."       Professor Wheeler dismisses as myth the notions that Joan was actually of noble birth, or that she never fully developed physically as a woman. These lectures reveal Joan as perhaps most memorable for what she was not: a queen, a mother, a beauty, or an intellectual. Instead, she was a woman of action, and the kind of person who is often an enigma to modern intellectuals: someone of profound religious faith.       Appreciating how these four heroines have been understood and misunderstood will help you understand how history passes judgment on both women and the Middle Ages. The contemporary research upon which this course is based can move us beyond how women "ought" to have been to better knowledge, however precarious, about how women were. 24 Lectures 1. Four Remarkable Medieval Women2. The Revolutionary Twelfth Century3. Prodigious Heloise4. Abelard's Story of Abelard and Heloise5. Heloise as LoverHer Sublime Submission6. Heloise, Adept Abbess and Mother7. Heloise of the Imagination8. Hildegard of Bingen, Sibyl of the Rhine9. Hildegard, Holy Hypochondriac10. Hildegard's Visionary Trilogy, Science and Letters11. Wholly Hildegard12. Eleanor's Lineage13. Eleanor, Duchess of Aquitaine, Queen of France14. Eleanor and the Politics of Estrangement15. Eleanor, Duchess of Aquitaine, Queen of England16. Eleanor the Dowager Queen17. Legendary Eleanor18. Joan of Arc and Her Times19. Joan Discovers Her Mission and Her Dauphin20. Joan the Warrior, Holy Berserker21. Joan's Success and Captivity22. Joan's Trial, Death, and Retrial23. Joan of the Imagination24. Four Pioneers

    And you'll also learn the "rules of the game" - the forces that drive those particles and the ways in which they interact - that underlie the workings of the universe.The lectures have been designed to be enriching for everyone, regardless of scientific background or mathematical ability. Virtually all you'll need as you enter this fascinating world are your curiosity, common sense, and, as Professor Pollock notes, "an open mind for the occasional quantum weirdness." As you move through the lectures, you'll also gain a knowledge of how those particles fit into perhaps the greatest scientific theory of all time: the Standard Model of particle physics; a grasp of key terms like "gauge symmetry," "quantum chromodynamics," and "unified quantum field Theory;" and an appreciation of how particle physics fits in with other branches of physics - including cosmology and quantum mechanics - to create our overall understanding of nature.

    

    One of the first paleoanthropologists to study fossil evidence and genetic information together in order to test hypotheses about human prehistory, Professor Hawks is adept at looking at human origins not just with one lens, but with two.He has traveled around the world to examine delicate skeletal remains and pore over the complex results of genetic testing. His research and scholarship on human evolutionary history has been featured in a variety of publications, including Science, American Journal of Physical Anthropology, Slate, and Journal of Human Evolution.But more than that, Professor Hawks has crafted a course that demonstrates the passion and excitement involved in the field of paleoanthropology. With his engaging lecturing style and his use of fossil finds taken from his personal collection, Professor Hawks will capture your attention and show you all the drama and excitement to be found in eavesdropping on the latest debates about human evolutionary history.

    From the rising and setting of the sun to the cycles of nature, the thought processes in our brains, and the biorhythms in our day, nothing so pervades our existence and yet is so difficult to explain. Time seems to be woven into the very fabric of the universe. But why? Consider these contrasting views of time: A movie of a person diving into a pool has an obvious arrow of time. When the movie is played backward, everyone recognizes that it shows an event that would never occur in the real world. But zoom in on any part of this scene at the atomic scale and the movie can be run backward or forward and be indistinguishable. Either way, the particle interactions are consistent with the laws of physics. Why does one movie have an arrow of time moving in only one direction and the other does not? Surprisingly, the search for an answer leads through some of the most pioneering fields of physics, including thermodynamics, relativity, quantum theory, and cosmology. The key concept is called "entropy," which is related to the second law of thermodynamics, considered by many scientists to be the most secure law in all of physics. But that's only the beginning, since the quest for the ultimate theory of time draws on such exciting ideas as black holes, cosmic inflation, and dark energy, before closing in on a momentous question that until recently was considered unanswerable: What happened before the big bang? In 24 riveting half-hour lectures, Mysteries of Modern Physics: Time takes you on a mind-expanding journey through the past, present, and future, guided by Professor Sean Carroll, noted author and Senior Research Associate in Physics at the California Institute of Technology.

    Classic stories and poems of American literature are found in the pages of Franklin, Emerson, Thoreau, Hawthorne, Melville, Dickinson, Twain, Whitman, Faulkner, James, Eliot, Fitzgerald, Hemingway, Steinbeck, Morrison, and many others. As Professor Arnold Weinstein reminds us: "American classics are wonderfully rich fare. America is a mythic land, a place with a sense of its own destiny and promise, a place that has experienced bloody wars to achieve that destiny. The events of American history shine forth in our classics." When was the last time you read them? Possibly not as recently as you'd like. Why? Not because you wouldn't love it. But perhaps the demands of your daily life or some other reason have prevented this pleasure. Now, here is the opportunity to gain an extraordinary familiarity with each of these authors within a manageable amount of time, as well as review the great works you may already know. What Explains Greatness? These works are both American and classics. The course has been crafted to explain why some works become classics while others do not, why some "immortal" works fade from our attention completely, and even why some contemporary works now being ignored or snubbed by critics may be considered immortal one day. One memorable work at a time, you'll see how each of these masterpieces shares the uncompromising uniqueness that invariably marks the entire American literary canon. From Sleepy Hollow to The Great Gatsby, Professor Weinstein contends that the literary canon lives, grows, and changes. What links these writers to each other—and to us readers today—is the awareness that the past lives and changes as generations of writers and readers step forward to interpret it anew. The course was born from Professor Weinstein's conviction that American literature is our "great estate," and that claiming this rightful inheritance—the living past and the lessons we can take from it—should be nothing less than a unique and joyous learning experience. Experience Two Centuries of America's Greatest Works Professor Weinstein explains that America's classic works should be savored as part of our inner landscape: part of how we see both America and ourselves. He leads you through more than two centuries of the best writers America has yet produced, bringing out the beauty of their language, the excitement of their stories, and the value in what they say about life, power, love, adventure, and what it means, in every sense, to be American. Perhaps you recall: --Melville's prowling Ahab, on the search for Moby Dick, and the power of the "grand, ungodly, Godlike man" --The quiet diner in The Grapes of Wrath and the pain of one of John Steinbeck's "Okies" trying to purchase a dime's worth of bread. --The parlor in Long Day's Journey Into Night and the lifetime of tension in a simple request to a father that he turn on the lights. Rip Van Winkle falls asleep for 25 years for some mysterious reason—but what exactly was it? Why did Emerson believe in self-reliance, and why do we? Twain, our first media celebrity, tells stories that have an inkling of Peter Pan: Tom Sawyer never does grow up. But Huck Finn must grow up to face the racism of the South and get past his own polluted conscience—can he do it? James brings American innocents to Europe for them to inherit the world—but do they? Discover the Stories behind America's Immortal Writers Consider that: --Emily Dickinson was virtually unheard of in her own time. --William Faulkner's books were out of print until the mid-1940s. --F. Scott Fitzgerald died believing he had been forgotten. Readers of their times would be astounded if they knew the immortality these writers achieved, just as we are astounded that they once were overlooked. Most of us don't know that when Walt Whitman self-published Leaves of Grass—seemingly in answer to Ralph Waldo Emerson's memorable wish for the poet America deserved—he sent a copy to Emerson, America's most revered man of letters. When Emerson replied in extraordinarily flattering terms, Whitman published his letter, virtually forcing the new poet's acceptance by a literati that would might have preferred to flee from Whitman's startlingly new, often sexual, poetry. Perhaps you share the common picture of Emily Dickinson: a passive, gentle, reclusive spinster content in her father's Amherst, Massachusetts, home. If so, allow Professor Weinstein to introduce you to her friend, clergyman and author Thomas Wentworth Higginson, who said of "gentle" Emily: "I never was with anyone who drained my nerve power so much. Without touching her, she drew from me. I am glad not to live near her." Through this course, you will learn to: --Explain the roles of self-reliance and the "self-made man" in the evolution of American literature --Identify the tenets of American Romanticism --Describe the evolution of the American ghost story, from Poe and Hawthorne to James and Morrison --Outline the epic strain in American literature, from Melville and Whitman to Faulkner and Ellison --Explain the importance of slavery as a critical subject for Stowe, Twain, Faulkner, and Morrison --Summarize perspectives on nature revealed in poets Whitman, Dickinson, Frost, and Eliot --Identify the tenets of Modernism in the work of Eliot, Fitzgerald, Hemingway, and Faulkner --Identify the contributions of O'Neill, Miller, and Williams to American theater --Summarize the threads of the complex relationship between America's great writers and the past. Savor the Joy of Great ReadingDr. Weinstein is the Edna and Richard Salomon Distinguished Professor at Brown University, where he has been teaching literature to packed classrooms since 1968. Brown University student course evaluation summaries reported: "By far, students' greatest lament was that they only got to listen to Professor Weinstein once a week." One customer writes: "Professor Weinstein is inspiring. Not only am I enjoying these lectures, but I am also rereading these wonderful classics and having a wonderful time." The course will lead you to read or reread masterpieces that intrigue you most. And with the deeper understanding you gain from the lectures, you will likely experience such joy from great reading that you may wonder why you have spent so much time on contemporary books. The 84 carefully crafted lectures in this course, each 30 minutes long, are your royal road to recapturing the American experience—and our intellectual and cultural heritage. Just review the lecture titles. All of this can be yours, and the journey will be as rewarding as the arrival.

    Boston College professor Peter Kreeft delivers a course addressing some of the questions man has been asking since the beginning of time. What is good? What is bad? Why is justice important? Why is it better to be good and just than it is to be bad and unjust?