The photographs of the whole Earth taken during the first manned flight to the moon had a stunning impact on our perception of the Earth. Those images gave us us a new perspective of our planet and its place in space. Humans had seen the moon, sun, and stars as mysterious presences from the dawn of our consciousness. Our imaginations had endowed these celestial objects with the powers of gods and mythologies were grounded by these existential archetypes. Being able to look back at our own planet had a similar effect, as theories like the Gaia principle sprung from people's awe of this new vision. Wall posters had been published in the late 1960's and I got one in 1969 that still has an enduring fascination for me.