Of all the natural disasters that could befall us only an Earth impact by a large comet or asteroid has the potential to end civilization in a single blow. Yet these near-Earth objects also offer tantalizing clues to our solar system's origins & someday could even serve as stepping-stones for space exploration. In this book Donald Yeomans introduces readers to the science of near-Earth objects
- its history applications & ongoing quest to find near-Earth objects before they find us. In its course around the sun the Earth passes through a veritable shooting gallery of millions of nearby comets & asteroids. One such asteroid is thought to have plunged into our planet sixty-five million years ago triggering a global catastrophe that killed off the dinosaurs. Yeomans provides an up-to-date & accessible guide for understanding the threats posed by near-Earth objects & also explains how early collisions with them delivered the ingredients that made life on Earth possible. He shows how later impacts spurred evolution allowing only the most adaptable species to thrive
- in fact we humans may owe our very existence to objects that struck our planet. Yeomans takes readers behind the scenes of today's efforts to find track & study near-Earth objects. He shows how the same comets & asteroids most likely to collide with us could also be mined for precious natural resources like water & oxygen & used as watering holes & fueling stations for expeditions to Mars & the outermost reaches of our solar system.