https://archive.org/stream/gaianewlookatlif00loverich#page/n16/mode/1up page 1 As I write, two Viking spacecraft are circling our fellow planet Mars, awaiting landfall instructions from the Earth. Their mission is to search for life, or evidence of life, now or long ago. This book is also about a search for life, and the quest for Gaia is an attempt to find the largest living creature on Earth. […] [I]f Gaia does exist, then we may find ourselves and all other living things to be parts and partners of a vast being who in her entirety has the power to maintain our planet as a fit and comfortable habitat for life. […] https://archive.org/stream/gaianewlookatlif00loverich#page/11/mode/1up page 11 We have since defined Gaia as a complex entity involving the Earth's biosphere, atmosphere, oceans, and soil; the totality constituting a feedback or cybernetic system which seeks an optimal physical and chemical environment for life on this planet.