" Biogenesis is in the first place psychogenesis. This truth was never more manifest than on Mars, where noosphere preceded biosphere-the layer of thought first enwrapping the silent planet from afar, inhabiting it with stories and plans and dreams, until the moment when John stepped out and said Here we are-from which point of ignition the green force spread like wildfire, until the whole planet was pulsing with viriditas. It was as if the planet itself had felt something missing, and at the tap of mind against rock, noosphere against lithosphere, the absent biosphere had sprung into the gap with the startling suddenness of a magician's paper flower "

― Kim Stanley Robinson , Green Mars (Mars Trilogy, #2)