Table of Contents

Introduction * Our "fortunate" place in the universe * Is our food club the only one on the planet?- The discovery of life at volcanic vents in the ocean floors * Subterranean life observed: the limitaztions of space, food and temperature * The derivation of petroleum * Biology and geochemistry * Where did life originate?- How widespread is life in the universe?- Another type of life even deeper?- Conclusion.