In living memory, global populations of fishes, birds, mammals, amphibians, and reptiles more than doubled what remains today. In a geological blink-of-the-eye, half of the earth’s species will be threatened with extinction. This loss will crescendo by the end of the century. Photographic artists across the medium are grappling with this unfathomable change. The forty-six works in Now You Don’t: Photography and Extinction make the biodiversity crisis increasingly perceptible, and gesture toward a contemporary aesthetics of endangerment and species loss.