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Signatures of Life: Science Searches the Universe, by Edward Ashpole
Download Ebook Signatures of Life: Science Searches the Universe, by Edward Ashpole
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An intriguing overview of the ways in which science could find evidence for extraterrestrial life
Are we alone in the universe, or is life a universal phenomenon? For fifty years, astronomers in SETI (Search for Extraterrestrial Intelligence) have scanned the universe for intelligent signals, but with no success. In this intriguing book, Edward Ashpole explains the probable reasons for this and discusses other avenues of investigation more in line with the nature of science and technology.
The author examines the problems inherent in scanning the universe for radio or optical signals from an alien intelligence. These include the difficulty of trying to communicate with another species possessing a completely unknown form of technology and the vast distances that alien communications would have to travel to reach us.
This leads Ashpole to other ways of finding evidence for extraterrestrial life, given that advanced civilizations would probably use artificial intelligence for interstellar travel. Our scientists now know how to detect the presence of life on a planet by observing its spectral lines, so more advanced alien researchers would have had ample time (about two billion years) to investigate these “signatures of life” coming from Earth. Hence, the author argues, alien space probes could exist within our own solar system; there might be evidence on the erosion-free Moon or on another moon or planet. In fact, a few scientists have scanned NASA's best photography, looking for evidence of such “alien archaeology.”
In a final chapter, the author urges an open-minded attitude on the part of scientists to all credible sources of information, along with the use of the scientific method to test various hypotheses and weed out the fantasy factor, which so often interferes with serious attempts to find hard evidence of extraterrestrial intelligence.
Informative and fascinating, Signatures of Life delves into a topic that often provokes wild speculation in a thought-provoking yet scientifically responsible way.
From the Hardcover edition.
- Sales Rank: #1964643 in eBooks
- Published on: 2013-07-09
- Released on: 2013-07-09
- Format: Kindle eBook
Review
"A unique hybrid of science and conjecture as the author looks at SETI methods and search tactics and presents some interesting and refreshingly new ideas.... Thought-provoking and original.”
-AstroGuyz
“Advising reliance on scientific methods over fantastical thinking, Ashpole urges us to continue ‘trying to discover the status of our lives and our world in the immensity of the universe.’”
-Publishers Weekly
“A very enjoyable book.... Ashpole is noticeably good at getting complex ideas across in clear, simple prose.”
-Open Letters Monthly
About the Author
Edward Ashpole (UK) is a science writer who has covered the life sciences for numerous publications in Britain and abroad. He is the author of The UFO Phenomena: A Scientific Look at the Evidence for Extraterrestrial Contacts and Where Is Everybody?
Most helpful customer reviews
0 of 0 people found the following review helpful.
Exponential Growth MUST End
By Richard Schwartz
The author seems to assume that technology, once initiated in a civilization, must continue to grow without end. This is not a good assumption; all growth eventually ends. So the assumption that alien civilizations must have created interstellar travel is a very weak one.
The talk of theology and ET is nonsense. Theology is the study of "gods". We have as much evidence for bigfoot, alien abduction, and telepathy as we do for "god", yet the author does nothing to discredit the concept of his imaginary friend who established all of the fundamental constants at exactly the right value. Future physics may find that the fundamental constants are related by certain constraints, as Maxwell's equations relate the speed of light to the electric and magnetic susceptibility of free space.
The Dyson sphere is a nogo. Much more attainable is something like ring world. In fact, there could be multiple ring worlds around a single star with different orbital distances and orbital planes so that they do not block each other's access to the energy source. But a sphere enclosing a star is not likely.
Author's relentless criticism of radio SETI fails to recognize work in biochemistry of the origins of life and other scientific work underway at SETI Institute, nor does he mention that installations like the Allen Telescope Array have astronomy uses beyond radio SETI.
So I am not thrilled with this book, though it is worth reading. It has some interesting ideas.
0 of 0 people found the following review helpful.
The never ending search
By Kindle Customer
This book goes into detail about the possibilities of alien life. Using a lot of scientific disciplines of how other life forms could originate from other planets. The book covers a lot of ufology.
0 of 1 people found the following review helpful.
A Deep Look into Our Vast Nature
By D. Wayne Dworsky
Signatures of Life attempts to answer the myriad questions that arise from contemplating our unique existence in the universe. Many of these are so fundamental that practically everyone will possess them sometime in his or her life. However, author, Ashpole raises even deeper concerns--those that motivate us to question reality. He truly concerns himself about the portability of life. Has it spread out through the cosmos? Have we come into the picture because life is seeded here from elsewhere? He raises these and other similar questions right from the first paragraph of the first chapter. Then, without stopping, he continues to probe for answers, further stimulating the reader's thoughts along the way. His quest is multi-layered, encompassing many common areas that most of us take for granted. Still, he manages to see things that most of us overlook. He is looking back at the Einstein Clock in Berne, waiting for the light from scientific enlightenment to reach him. Does he see this world percolating with possibilities as static or can he find new avenues to explore that are so dynamic that they can lead us into a wonderland of discovery?
Edward Ashpole is taking that bold step to look deeply into our vast nature. And, in so doing, he paves the way with glistening cobblestones that illuminate our curiosity by his indelible style that persists to turn over every stone, to uncover the minutest detail that will one day show us who we really are. He takes a heroic step in the direction of understanding by the endorsement of his vehement prose.
Ashpole has a powerful message. It is told from a substantial platform, the number of facets is mind-boggling. What kind of individual is he who looks so deeply and ardently into our very nature? The author is to be applauded if, for anything, just to address these important concerns that most of us wish someone would examine.
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