All Alone After All?

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Science  28 Apr 2000:
Vol. 288, Issue 5466, pp. 625
DOI: 10.1126/science.288.5466.625a

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Rare Earth Why Complex Life Is Uncommon in the Universe. Peter D. Ward and Donald Brownlee. Copernicus (Springer-Verlag), New York, 2000. 361 pp. ISBN 0-387-98701-0.

The authors, a paleontologist and an astronomer, argue that while life at the level of microbes may be common in the universe, life at the level of even simple animals is likely to be extremely rare.

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