On Christmas Eve 1968, William Anders took what has been described as “the most influential environmental photograph ever taken”.
Anders was aboard Apollo 8, the first manned spacecraft to leave the Earth’s orbit. He and his crewmen had spent several days studying the lunar surface, taking photographs from their capsule, their attention trained upon the naked expanse below. But then it occurred to Anders to look up. “This gorgeous, colourful, beautiful planet of ours [was] coming up over the ugly lunar horizon.” Anders turned his camera