Scientist Peter Ward examines the great extinction that ended the Permian period 250 million years ago, presenting a compelling first-person account of his high and low points as a scientist as a parallel to the extinction itself. The autho...
An investigation into a 250-million-year-old environmental apocalypse that predated the age of the dinosaurs describes an event that caused the annihilation of ninety percent of all plant and animal species on Earth, taking a close up look ...