Biotechnology, computers, cell phones, and the Internet -- they're all having a major impact on our lives as the twenty-first century begins. Surrounded by today's array of new technologies, it is easy to feel overwhelmed and bewildered. For more than a century,Scientific Americanhas made the machines and technologies that make up our world understandable. InScientific American: How Things Work Todayyou'll find over 100 topics explored in easy-to-understand text and made absolutely clear with the aid of more than 600 fully annotated, three-dimensional illustrations and color photographs. Do you know where all those stairs on the escalator go when they get to the top? Did you know that every time you use a credit card the clerk bounces a signal off a satellite to get an okay for your purchase? Have you ever wondered how your e-mail gets from here to there? Or how the signal finds your cell phone when you're hundreds of miles from home?Scientific Americanknows, and inScientific American: How Things Work Today, it tells and shows you how the world around you works, with three-dimensional illustrations, diagrams, and exploded views as well as up-to-the-minute color photographs. And the explanations are in the concise, understandable language that has madeScientific Americanthe most successful popular science magazine in the world. Scientific Americanhas been the authoritative popular source of science information about how the world works for more than 150 years. Now, in the first book based on the magazine's popular "Working Knowledge" column,Scientific Americanreveals exactly how the wonders of the modern world work. Assembled by a team of professional science and technology writers,Scientific American: How Things Work Todayshows the hidden workings of satellites, the Space Shuttle, subways, sewers, the Internet, electron microscopes, and many of the other systems and devices that help make our world what it is and us who we are. With lavish pictures, photographs, and hundreds of explanations to how our world works, this book is an essential addition to every family's library.