wipe out one or more years of the global rice crop (a staple subsistence crop for a very large portion of the world's population). Larger asteroids or comets, have in the past driven thousands of species to sudden extinction. Humans are not invulnerable to this same fate, especially if they continue to refuse to take advantage of their unique survival adaptation: the ability to think, to explore and decipher the mysteries of our universe, and the ability to predict future long term consequences of our present day actions.