"Gaia Hypothesis." . "Gaian hypothesis" . "planet's lifeforce" . . . . . "Gaia Theory" . . "Gaia" . "Gaia Hypothesis" . . . . . "Gaia Project" . "Earth's consciousness" . . "World Soul" . . "Gaia hypothesis" . . . "Gaia theory" . . "Gaia hypothesis criticism" . "hypotheses" . "''Gaia theory''" . "Gaia spirit" . "hypothesis" . . . "Gaia hypothesis" . . "theory" . "Earth" . . "organism" . "Gaia theorists" . . . . . . . . "planet's consciousness" . "Gaia theory or hypothesis" . . "GAIA Hypothesis" . . .