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What If the Moon Didn't Exist?: Voyages to Earths That Might Have Been
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What If the Moon Didn't Exist?: Voyages to Earths That Might Have Been

3.87  ·  Rating Details  ·  106 Ratings  ·  8 Reviews
"Seductively cunning. . . . All these 'what-ifs' have the cumulative effect of making us excruciatingly aware of what a special and precarious place we inhabit--and how easy it would have been for it to be otherwise."--Washington Post
Paperback, 336 pages
Published January 1st 1995 by Perennial (first published November 1993)
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Mark
Jan 23, 2016 Mark rated it liked it  ·  review of another edition
Shelves: science
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J.k
Mar 07, 2016 J.k rated it it was amazing  ·  review of another edition
A must for hard sci-fi folks who want to world-build. So many ideas here.
Nick
Nov 21, 2011 Nick rated it it was amazing  ·  review of another edition
Shelves: sci-fi, science
It took me like 5 years to finish this thing, but its great. Basically hard scifi without any plot. Its an astrophysicist rambling about what earth might be like if there was no moon, or if the sun was really massive, or if the earth was really tiny, or if a black hole passed close by etc. Very straightforward concept. The latter chapters are less interesting, but it still gets 5 stars. This book is useful for communicating that Earth is not specially built for humans. If earth was different, li ...more
Greg
Jul 18, 2010 Greg rated it really liked it  ·  review of another edition
This was an interesting presentation of a variety of alternate Earths. The author explains the effects on evolution on Earth based on slight changes: removing the moon; moving the moon closer; increasing Earth's mass; increasing our sun's mass, etc. The explanations were clear even to a novice, such as myself.
Patty Jansen
Written in non-technical language, this book explores a number of different scenarios by which life on Earth would be possible, but would be profoundly different from the way we know it.
Bettie☯
Dec 29, 2014 Bettie☯ rated it it was ok
Discussion on LJ - liddle_oldman

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Jack
Apr 13, 2008 Jack rated it liked it  ·  review of another edition
Good if you're into the technical aspects of what if....
Albert Barlow
Jan 05, 2011 Albert Barlow rated it it was amazing  ·  review of another edition
Awesome!
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