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Conventional wisdom suggests English is going to the dogs, that bad grammar, slang, and illogical constructions signal a decline in standards of usage - to say nothing of the corruption wrought by email and text messages. But English is a complicated, marvelous language. Far from being a language in decline, English is the product of surprisingly varied linguistic forces, some of which have only recently come to light. And these forces continue to push English in exciting new directions.

To better put into perspective the various issues surrounding energy in the 21st century, you need to understand the essential science behind how energy works. And you need a reliable source whose focus is on giving you the facts you need to form your own educated opinions.

In 1900, the U.S. sent three doctors to Cuba to discover how yellow fever was spread. There, they launched one of history's most controversial human studies. Compelling and terrifying, The American Plague depicts the story of yellow fever and its reign in this country - and in Africa, where even today it strikes thousands every year. With "arresting tales of heroism," it is a story as much about the nature of human beings as it is about the nature of disease.

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.

This course chronicles the history of Earth and life on Earth from the point of view of the minerals that made it all happen. A major theme is how minerals and life coevolved, leading to the unprecedented mineral diversity on our world compared to the other planets in the solar system. Professor Hazen tells this epic story in 48 action-packed lectures that take you from the big bang to the formation of the solar system to the major milestones that marked the evolution of Earth and life.

As the "science of humanity," anthropology can help us understand virtually anything about ourselves, from our political and economic systems, to why we get married, to how we decide to buy a particular bottle of wine. This 24-lecture course reveals the extraordinary power of anthropology - and its subspecialty, cultural anthropology - as a tool to understand the world's varied human societies, including our own.

What does it mean to be human? Where did we come from? And what unites us in our diversity today? Anthropology and the Study of Humanity is your chance to tackle these big questions as you survey one of the world's most engaging - and human - sciences. Taught by acclaimed professor and field researcher Scott M. Lacy of Fairfield University, these 24 wide-ranging lectures are the ideal guide through the world of anthropology, or the study of humanity across time and space.

The word "barbarian" quickly conjures images of Attila the Hun and Genghis Khan. Yet few people realize these men belong to a succession of nomadic warriors who emerged from the Eurasian steppes to conquer civilizations. It's a part of ancient and medieval history that's often overlooked, but for an accurate view of how the world evolved, it's essential. Covering some 6,000 miles and 6,000 years, this eye-opening course illuminates how a series of groups pushed ever westward, coming into contact with the Roman Empire, Han China, and distant cultures from Iraq to India.

In this first volume of his memoirs, then-newly-qualified vet James Herriot arrives in the small Yorkshire village of Darrowby, and he has no idea what to expect. How will he get on with his new boss? The local farmers? And what will the animals think? This program is filled with hilarious and touching tales of the unpredictable Siegfried Farnon, his charming student brother Tristan, and Herriot's first encounters with a beautiful girl named Helen.

For most of its 5,000-year existence, China has been the largest, most populous, wealthiest, and mightiest nation on Earth. And for us as Westerners, it is essential to understand where China has been in order to anticipate its future. These 36 eye-opening lectures deliver a comprehensive political and historical overview of one of the most fascinating and complex countries in world history.You'll learn about the powerful dynasties that ruled China for centuries; the philosophical and religious foundations-particularly Confucianism, Daoism, and Buddhism-that have influenced every iteration of Chinese thought, and the larger-than-life personalities, from both inside and outside its borders, of those who have shaped China's history. As you listen to these lectures, you'll see how China's politics, economics, and art reflect the forces of its past.From the "Mandate of Heaven," a theory of social contract in place by 1500 B.C.E., 3,000 years before Western philosophers such as Thomas Hobbes and John Locke, to the development of agriculture and writing independent of outside influence to the technologically-advanced Han Dynasty during the time of the Roman Empire, this course takes you on a journey across ground that has been largely unexplored in the history courses most of us in the West have taken.In guiding you through the five millennia of China's history, Professor Hammond tells a fascinating story with an immense scope, a welcome reminder that China is no stranger to that stage and, indeed, has more often than not been the most extraordinary player on it.