Biography earth rare planet
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Rare Earth: Why Complex Life Is Uncommon in the Universe
book by Peter Ward and Donald E. Brownlee
Rare Earth: Why Complex Life Is Uncommon in the Universe is a popular science book about xenobiology by Peter Ward, a geologist and evolutionary biologist, and Donald E.
Brownlee, a cosmologist and astrobiologist.
Biography earth rare planet
The book is the origin of the term 'Rare Earth Hypothesis' which denotes the central claim of the book: that complex life is rare in the universe.
Synopsis
Ward and Brownlee argue that the universe is fundamentally hostile to complex life and that while microbial life may be common in the universe, complex intelligent life (like the evolution of biological complexity from simple life on Earth) requires an exceptionally unlikely set of circumstances, and therefore complex life is likely to be extremely rare.
They argue that among the essential criteria for complex life are a terrestrial planet with plate tectonics and oxygen, a large moon, magnetic field, a gas