We all have cell phones, but how many of us know how they actually work? Visit the world of communications satellites, radio towers, and mobile networks. You'll take an in-depth look at how bandwidth, infrastructure, and competition between companies like Motorola and AT&T have allowed for truly global communications.

Study two of the major inventions of the 20th century, nuclear weapons and nuclear power. Nuclear technology has inspired the utopian dream of cheap, abundant electricity as well as the apocalyptic fear of annihilation. This captivating lecture gives you a look at the inner workings - and risks - of nuclear bombs and reactors.

In addition to creating material abundance, technology, whether it's an oxcart or a telecommunications network, facilitates interaction between people. Explore the role of trade in early societies and how ships, coins, and the alphabet shaped the civilizations of the ancient Mediterranean.

What lessons can we learn about technological creativity from history? How does studying inventions change our understanding of history? As you wrap up your course, reflect on what you've learned about the material dimension of history, consider the nature of progress, and take away some key messages about how we can "use yesterday's technology to solve tomorrow's problems today."

Inventions are more than merely practical things. This lecture shows you the evolution of the pagoda and the cathedral, which grew out of the spiritual practices of East Asia and Europe, respectively, and how religious beliefs can inspire remarkable developments in engineering and architecture.

Other than the personal computer, the Model T may be the single most important technology artifact of the 20th century. After surveying the history of automobiles, this lecture introduces you to Henry Ford and tells the story of the Model T - the car that changed the way Americans thought about travel and launched a consumer revolution.

Shift your attention away from technology and production to the consumption side of the story. The 19th and early 20th centuries gave rise to three new ways to shop: the department store, the mail-order catalog, and chain stores. Examine how these new ways of selling goods shaped American life - and gave rise to some of our most iconic brands.

See how the combination of several essential functions - the detection of radio waves, the amplification of weak signals, and the operation of switches - led to all of our electronic gadgets, from radios to computers. Professor Carlson takes you into the fascinating world of vacuum tubes, transistors, and integrated circuits.

The mid-19th century saw the rise of analog communications, where film and electric currents were used as substitutes for an object or message. Meet the inventors of the first information age - among them, Louis Daguerre, Alexander Graham Bell, and Thomas Edison - and learn how they made information and knowledge widely available to millions.

Inventions are not necessarily "finished" until they are put into the hands of consumers, and perhaps nowhere is this more apparent than in the world of social media, where a Tunisian blogger can be as much an "inventor" of Facebook as Mark Zuckerberg. This lecture looks at the evolution of social media and its role in recent political events around the world.