Deep Life takes readers to uncharted regions deep beneath Earth's crust in search of life in extreme environments and reveals how astonishing new discoveries by geomicrobiologists are helping the quest to find life in the solar system.

Tullis Onstott, named one of the 100 most influential people in America by Time magazine, provides an insider's look at the pioneering fieldwork that is shining vital new light on Earth's hidden biology--a thriving subterranean biosphere that scientists once thought to be impossible. Come along on epic descents two miles underground into...