TIME IS RUNNING OUTDecades from now, an artificial black hole has fallen into the Earth's core. As scientists frantically work to prevent the ultimate disaster, they discover that the entire planet could be destroyed within a year.But while they look for an answer, some claim that the only way to save Earth is to let its human inhabitants become extinct: to reset the evolutionary clock and start over.Earth is the Hugo and Locus Award-nominated novel that, with countless accurate predictions, earned David Brin his reputation as a visionary futurologist.