What made the sound barrier such a difficult challenge for early flight pioneers, and why did it represent such a fundamental breakthrough for the future of aviation? In this lecture delivered by Professor James W. Gregory, we take an inside look at the basic scientific problems surrounding supersonic flight that had to be solved, including wing design, high-speed air pressure dynamics, and the mechanical dangers that made many in the scientific community conclude it simply wasn't possible to fly faster than sound.
Gregory provides helpful animations and archive footage to illustrate how test pilot Chuck Yeager finally broke the barrier in , ushering in the jet age that we still benefit from, and even take for granted today. For this free Great Courses lecture, horticulturist Melinda Myers walks you through the broad steps needed to transform your backyard into a beautiful garden you can enjoy and use for years to come.
Using a large property as her test garden, Myers talks about "The 4 Rs" everyone should remember before redesigning their space: the Right Plant, the Right Purpose, the Right Place, and the Right Look. From there, Myers talks about how to evaluate what you have, what you might need to do to prepare your land, and what flora and fauna might be best for you given the realities of climate, plant hardiness, and what's important to you aesthetically.
Wonderful for those that are itching to work with their green thumb but don't know where to start! Why do we whisper when we enter a cathedral? Kehoe examines this and many other social situations and how our learned cultural experiences pass on the values and norms of our communication. He also provides some insights into how cultures are different when it comes to their methods of communication citing a study of students from Southern U.
This is a compelling lecture that will get you thinking about how your own culture has shaped your communication. Introduction to World Economic History. Harreld, Ph. Harreld starts out by describing his own interest in economic history. He then lays out many of the terms that will be examined in various stages of the history he will be teaching in the course including production, demand, distribution, business contracts, markets, trade, and even a complex definition of capitalism itself.
He also briefly describes some of the schools of economics that will be studied during the course such as neoclassical economics and Marxian economics. Learning How to Practice the Guitar. He tells a story about the importance of practice and then goes on to teach how to hold the guitar and how to play some simple notes, chords, and scales. Along the way you'll see helpful diagrams to show you how to play each of these elements. Roots of Irish Identity: Celts to Monks.
The Great Courses have added over 50 free lectures from their latest courses to their YouTube channel. One of the lectures they added comes just in time for St. Patrick's Day. In the lecture Professor Conner introduces the course by tracing Irish identity back to the Celts as he details their mythology.
He also provides the background of Saint Patrick and of the monks who "saved civilization" by writing out much of the knowledge of Greek and Roman literature after the collapse of the Roman Empire. You'll probably want to watch this lecture as it contains some beautiful imagery of Ireland and aspects of Irish civilization. Get in the Irish spirit with this free lecture from The Great Courses.
For people of a certain generation, the John F. Kennedy assassination changed America forever, prefiguring a loss of innocence that has lasted into the modern era. In the end, Fears believes that JFK's death changed history for the worse, and in this lecture he makes a compelling case for what might have been. Facets of Major World Religions. He provides examples as to how many world religions have these features which provide the groundwork for how he will examine the major world religions in the rest of the course.
Berkson effectively communicates these facets of religion to begin a very informative course that will cover the basics of Hinduism, Buddhism, Confucianism, Taoism, Judaism, Christianity, Islam, and a few other religious traditions. Mind Bending Math: Voting Paradoxes.
Learn about the complex mathematical scenarios behind many of the most popular voting methods in the United States and around the World. Professor David Kung, Ph. He examines the plurality systems and the popular vote, the Electoral College, runoff voting, majoritarian voting, and other systems. Look at examples of candidates winning such as Jesse Ventura's historic gubernatorial victory in Minnesota where he only would've likely won with a popular voting system and he did.
The lecture will surely get you thinking about what voting system is best. He then gives viewers a brief introduction as to what Tai Chi is and how it started, coming out of the Taoist tradition.
He then demonstrates the Yang-style movement form that he will be teaching throughout the course. You'll definitely want to watch this lecture, rather than just listen to it, as it's mostly an intro to Tai Chi through its physical display. Basic Structure of the Atom.
Davis Jr. In this lecture Professor Davis gives a history of discoveries about the atom from protons to electrons to neutrons.
He concludes the lecture with how atomic mass is calculated and examines the atoms of some of the most well known elements including hydrogen, carbon, and uranium. You'll also learn a little about isotopes, anions, and cations. The Story of Ancient Olympia.
Go back to the days of the ancient Greek Olympics in this free lecture from the Great Courses series. This free lecture is available from The Great Courses through their new YouTube channel which also features course trailers, lecture samples, and more. The Power of a Mathematical Picture.
Must-Know Tactical Patterns in Chess. Three-Dimensional Geometry: Solids. The Learning Brain. Building a Better Vocabulary. How to Sing. Secrets of Mental Math.
Holy Land Revealed. Math and Magic. Cooking across the Ages. Tai Chi Fitness Workouts. Mastering Tai Chi. The Art of Video Storytelling. Introduction to Astrophysics. New Releases New Release. Understanding Human Emotions.
New Release. The Rise of Modern Japan. The Triumph of Christianity. How to Play the Ukulele. Breaking Their Silence. Social Media The Real History of Pirates. Learning Java Programming. History Mathematics Programs for Young Learners Science Travel Learning that fits your life Watch any course anytime, anyplace! Available On. No Homework, No Tests, No Pressure Learn at your own pace with no schedule, while exercising, commuting, or just relaxing.
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Note: The free lectures by The Great Courses have been taken offline. But no worries, you can find over 33, hours of free lectures from top universities in our collection, 1, Free Online Courses from Top Universities. They'll keep you busy for years to come. Follow Open Culture on Facebook. We recently published a list of websites where you can download free eBooks, or purchase, borrow, or rent eBooks.
However, if you would rather listen to your favorite books, here are some websites offering audiobooks you can download, rent, or purchase, some free, some not. There a lot of free audiobooks available on various sites, some in the public domain and some from independent authors.
LibriVox is a non-commercial, non-profit, and ad-free project that posts audiobooks recorded from books in the public domain, recorded by volunteers, and made available as MP3 downloads or podcasts. The goal of LibriVox is to make all books in the public domain available as free audiobooks on the web. In addition to downloading audiobooks, you can also volunteer to be a reader. The only qualification is that you have an audible voice. Books Should Be Free provides audiobooks from the public domain available for free that you can listen to on your iPhone, Android, Kindle, or MP3 player.
However, Books Should Be Free provides a more visually entertaining experience and easier way to browse through audiobooks, which are divided into many different genres for your browsing enjoyment. If you like soap operas, NewFiction offers audiobooks in episode format, performed by multiple, trained, dramatic actors, called iSoaps. You can also listen to the episodes online or download them directly to your computer or portable device. They offer about free audiobooks in episodes as podcasts, available in 30 categories.
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