Gorgon: The Monsters That Ruled the Planet Before Dinosaurs and How They Died in the Greatest Catastrophe in Earth's History

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 at the prehistoric world of the gorgons, the causes of mass extinctions, and their implications for the future of humankind. Reprint.