Humanity has become desensitised to the power of photographs of the whole Earth, taken from space. At least, I have to assume we have. This kind of photo has been around my entire life. I have no personal experience of living in a world where we *know* we're all on this one round, mostly blue thing suspended in a void, but nobody has ever actually seen that fact with their own eyes, not even indirectly via photography. But, hard to believe as it is for people born afterwards, that really was the way it was right up until the 1960s. Nobody really knew, in an palpable way, what our planet, humanity's cradle, humanity's home, in all likelihood humanity's grave, looked like. And then we did! And while I can't imagine what that experience was like, I can and have read about its effect on people of that time and their mindsets toward our planet. The hippy and environmental movements unsurprisingly siezed on this powerful new image. Stewart Brand famously incorporated the image into his "Whole Earth Catalogue". Full colour photos of the whole Earth started coming in from space in the mid-to-late 1960s, and the first ever Earth Day happened in 1970 - *before* the 1973 oil shock - and that's almost certainly not a coincidence. Seeing the face of our beautiful, deliate, fragile home from a new perspective gave *us* a new perspective.