The marvelous microbes that made life on Earth possible and support our very existenceFor almost four billion years, microbes had the primordial oceans all to themselves. The stewards of Earth, these organisms transformed the chemistry of our planet to make it habitable for plants, animals, and us. Life's Engines takes readers deep into the microscopic world to explore how these marvelous creatures made life on Earth possible-and how human life today would cease to exist without them.Paul Falkowski looks "under the hood" of microbes to find the engines of life, the actual working parts that do the biochemical heavy lifting for every living organism on Earth. With insight and humor, he explains how these miniature engines are built-and how they have been appropriated by and assembled like Lego sets within every creature that walks, swims, or flies. Falkowski shows how evolution works to maintain this core machinery of life, and how we and other animals are veritable conglomerations of microbes.A vibrantly entertaining book about the microbes that support our very existence, Life's Engines will inspire wonder about these elegantly complex nanomachines that have driven life since its origin. It also issues a timely warning about the dangers of tinkering with that machinery to make it more "efficient" at meeting the ever-growing demands of humans in the coming century.

Acknowledgments ixPrologue 1
CHAPTER 1 The Missing Microbes 9
CHAPTER 2 Meet the Microbes 23
CHAPTER 3 The World before Time 40
CHAPTER 4 Life's Little Engines 47
CHAPTER 5 Supercharging the Engines 68
CHAPTER 6 Protecting the Core Genes 91
CHAPTER 7 Cell Mates 108
CHAPTER 8 Supersizing in Wonderland 124
CHAPTER 9 The Fragile Species 145
CHAPTER 10 The Tinkerers 161
CHAPTER 11 Microbes on Mars and
Butterflies on Venus? 173
Further Readings 187
Index 191