===About the Book=== A microscopic black hole has accidentally fallen into the Earth's core, threatening to destroy the entire planet within two years. Some scientists are frantically searching for ways to prevent the disaster. But others argue that the only way to save the Earth is to let its human inhabitants become extinct: to let the evolutionary clock rewind and start all over again. More than a compelling, masterfully told story, Earth is a profound testament about our responsibility to our planet – a message so stirring, it reaches out from the pages to embrace and inspire us all. Nominated for a Hugo in 1991.