Neil Maher provided a detailed and engaging study of the Blue Marble's place within environmental histories. Neil complicated the standard argument that this photograph immediately became an icon associated with the environmental movement, arguing instead that early interpretations stressed "global unity, not planetary environmental concern." He noted the fact that the Blue Marble is absent from visual culture of the 1970s environmental movement. Not until 1990 does it become prominent in campaign imagery (view from 21 mins for a discussion of this imagery) . Rather, we see the beginning of "the greening of the Blue Marble" through the 1980s, with NASA using images of the globe to illustrate space data related to climate change and ozone depletion. Neil's arguments had already served as talking points, had been discussed and reflected on in earlier talks (e.g. Jennifer Levasseur's above) and during Q&A sessions. It was, therefore, all the more timely to have these arguments developed here in such detail. Neil provided rich historical and visual material and takes us on a journey through post-war America's appropriation and re-appropriation of Whole Earth imagery, in science, in politics and in public culture. Interspersing the talk, and afterward, there was a lively discussion and Q&A, which raised new  points related to the Blue Marble's environmental significance. Click to the right to watch the full talk, imagery and discussion. And find links to more of Neil's work in the "Further Resources" section, including his influential book Apollo in the Age of Aquarius.