Asteroids and comets have played an important role throughout the history of life on earth. It is quite probable that the dinosaurs have been exterminated by an asteroid's impact in the Gulf of Mexico. Huge tidal waves and fire storms wiped out all life. This is the year 2067 according to the Christian calendar. A collision has just taken place in the asteroid belt between Mars and Jupiter and caused an asteroid to enter the earth's power of gravitation. It is instoppably approaching the blue pl...