Book excerpt: A celebration of beer—its science, its history, and its impact on human culture What can beer teach us about biology, history, and the natural world? From ancient Mesopotamian fermentation practices to the resurgent American craft brewery, Rob DeSalle and Ian Tattersall peruse the historical record and traverse the globe for engaging and often surprising stories about beer. They explain how we came to drink beer, what ingredients combine to give beers their distinctive flavors, how beer’s chemistry works at the molecular level, and how various societies have regulated the production and consumption of beer. Drawing from such diverse subject areas as animal behavior, ecology, history, archaeology, chemistry, sociology, law, genetics, physiology, neurobiology, and more, DeSalle and Tattersall entertain and inform with their engaging stories of beer throughout human history and the science behind it all. Readers are invited to grab a beer and explore the fascinating history of its creation.