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Extraterrestrials : Where Are They? - Ben Zuckerman


Where Are They?

By: Ben Zuckerman (Editor), Michael H. Hart (Editor)

Paperback Published: 27th November 1995
ISBN: 9780521448031
Number Of Pages: 252

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Is it possible that extraterrestrial life forms exist within our Galaxy, the Milky Way? This book offers a critical analysis by leading experts in a range of sciences, of the plausibility that other intelligent lifeforms do exist. Exploration of the Solar System, and observations with telescopes that probe deep space, have come up empty handed in searches for evidence of extraterrestrial life. Many experts in the fields of astronomy, biology, chemistry and physics are now arguing that the evidence points to the conclusion that technological civilisations are rare. After ten billion years, and among hundreds of billions of stars, we may well possess the most advanced brains in the Milky Way Galaxy. This second edition contains many new and updated aspects of extraterrestrial research, especially the biological viewpoint of the question.

..".provides a fascinating series of articles by thoughtful scientists representing the broad range of disciplines that bear on the question of life elsewhere in the universe. The book contains lucid descriptions of the evidence from physics, chemistry, and especially evolutionary biology that permit speculation about the emergence of technological beings. The book is readable by anyone and will tickle the fancy of any person curious about our uniqueness in the universe." Geoffrey W. Marcy, American Journal of Physics

An explanation for the absence of extraterrestrials on Earth
One attempt to find where they are: NASA's high resolution microwave survey
An examination of claims that extraterrestrial visitors to Earth are being observed
The likelihood of interstellar colonization, and the absence of its evidence
Preemption of the galaxy by the first advanced civilization
Stellar evolution: motivation for the mass interstellar migrations
Interstellar propulsion systems
Interstellar travel: a review
Settlements in space, and interstellar travel
Estimates of expansion time scales
A search for tritium sources in our Solar System may reveal the presence of space-probes from other stellar systems
Primordial organic cosmochemistry
Chance and the origin of life
The RNA world: life before DNA and protein
The search for extraterrestrial intelligence
Alone in a crowded universe
Possible forms of life in environments very different from the Earth
Cosmological SETI frequency standards
Galactic chemical evolution: implications for the existence of habitable planets
The frequency of planetary systems in the galaxy
Atmospheric evolution, the Drake equation, and DNA: sparse life in an infinite universe
Table of Contents provided by Publisher. All Rights Reserved.

ISBN: 9780521448031
ISBN-10: 0521448034
Audience: General
Format: Paperback
Language: English
Number Of Pages: 252
Published: 27th November 1995
Country of Publication: GB
Dimensions (cm): 22.84 x 15.27  x 1.7
Weight (kg): 0.4
Edition Number: 2
Edition Type: Revised

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