Rogue Asteroids and Doomsday Comets

Could an asteroid or comet crash into the Earth and destroy life as we know it? This study investigates the facts and provides evidence of massive asteroid impacts on the Earth's surface over the centuries. It reveals, through modern astronomical observation, the many objects orbiting the Earth.

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Astronomer Duncan Steel provides the most up-to-date and comprehensive introduction to the serious science behind these predictions. Steel is a world authority on the comet hazard and member of the NASA team set up to study the problem. Here he describes all the latest findings, surveys the fascinating evidence of past impacts, and describes the bold plans proposed to divert an incoming "death star" before it strikes.