Since 1968, Bernie Krause has traveled the world recording the sounds of remote landscapes, endangered habitats, and rare animal species. Through his organization, Wild Sanctuary, he has collected the soundscapes of more than 2,000 different habitat types, marine and terrestrial. With powerful illustrations and compelling stories, Krause provides a manifesto for the appreciation and protection of natural soundscapes. In his previous book, Krause drew readers attention to what Jane Goodall described as the harmonies of nature . . . [that are being] one by one by one, snuffed out by human actions. He now explains that the secrets hidden in the natural worlds shrinking sonic environment must be preserved, not only for our scientific understanding, but for our cultural heritage and humanitys physical and spiritual welfare.