I was eight years old the first time I considered the end of the world. In Terminator 2: Judgment Day, Sarah Connor sees a vision of a mushroom cloud and the explosion sets her alight. She is reduced to a skeleton on a playground. This idea that in a moment everything could change or end was so striking, it never quite left my mind. Questions regarding the survival of our species used to be confined to religious debate or science fiction. Unsettling visions and predictions of