Impact!: Threat of Comets and Asteroids

by Gerrit L . Verschuur (Author)

• Used

  Hardcover
  1997

  $6.14

  Sixty five million years ago, a large asteroid or comet collided with the Earth and caused a worldwide catastrophe: the exctinction of as much as 60% of all species, including the dinosaurs. Such collisions were thought to be so rare that the threat to life on Earth from such objects was dismissed as being too unlikely to worry about. This book calls attention to cosmic threats and the precarious nature of life on Earth.