To understand continental drift and plate tectonics, the shifting and collisions that make and unmake continents, requires a long view. The Earth, after all, is 4.6 billion years old. This book extends our vision to take in the greatest geological cycle of all one so vast that our species will proba[...]

More than 470 million years ago, a stupendous collision in the Asteroid Belt bombarded the Earth with meteorites of all sizes. New research suggests that the resulting ecological disturbance may have been responsible for the single greatest increase in biological diversity since the origin of comple[...]