Hobby and Lifestyle

The Sport of Birding: Why Do Birds of a Feather Flock Together?

Learn core elements of birding and methods for observing birds in the field. Open the door to an endlessly rewarding pursuit, and a lifetime of enjoyment. Begin by discovering six categories of bird behavior, that provide vital information for identification and learn how individual species are distinguished by typical or unique behavioral traits. […]

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Physics

The Theory of Everything: Two Major Unifying Theories of Physics

The unifying theories of physics are among the greatest and most complex in all of science; they stand as incomparable masterpieces in the gallery of modern thought. As you experience them, you will witness their progression toward ever-grander insights, pointing towards an as-yet-unfinished ultimate synthesis that will transform our understanding of the universe. […]

Foreign Languages

Learning French Manners and Culture

In this full lecture you will explore French manners and culture, and use a beginner’s understanding to build on simple phrases in French. Then reflect on several “word families” that will help you build your vocabulary and make connections across the language. Along the way, you’ll also pick up a few common verb forms, adjectives, and adverbs. […]

Engineering

Breaking the Sound Barrier and Beyond

During and just after World War II, the quest for ever faster fighter planes reached an apparent natural barrier—the speed of sound. Yet, on approaching this limit, aircraft became unstable and uncontrollable. In this full lecture, discover how a new approach to aircraft design solved the problem of compressibility and shock waves in this transonic region, paving the way for supersonic flight and paved the way to breaking the sound barrier. […]

History

Biological Anthropology—Unpacking Race and Biology

What does it mean to be human? Where did we come from? And what unites us in our diversity today? As the world population continues to explode, these big questions about humanity become increasingly important, and biological anthropology is the field of study that tackles them. […]

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