Peter Ward and Donald Brownlee's "Rare Earth"

  title={Peter Ward and Donald Brownlee's "Rare Earth"},
  author={James F. Kasting},
  journal={Perspectives in Biology and Medicine},
  pages={117 - 131}
  • J. Kasting
  • Published 1 February 2001
  • Art
  • Perspectives in Biology and Medicine
117 THE QUESTION OF WHETHER LIFE, especially intelligent life, is common in the universe is one that has fascinated authors and readers for many years. Carl Sagan, who was always optimistic about both these possibilities, argued that humans were not alone in the universe. He could not, of course, prove many of his points, but he presented his opinions with great conviction and with a considerable degree of literary flair. Now a new book has come along that takes issue with many of these… 

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