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How to Build a Time Machine
P. C. W. Davies

Viking Adult, 2002 - 128 pages

average customer review:based on 19 reviews
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   highly recommended  highly recommended





A Real-Science Time Travel Plan!

I have read other books by Paul Davies, and found this one as enlightening, entertaining and challenging as previous ones. This is serious science, not science fiction. Davies outlines in a very readable style, with good diagrams and humorous illustrations, the current thinking in Quantum Physics concerning the concept of time.

He discusses the mechanical and mathematical possibilities of moving between points in times, reflecting on principles and implications in the Theory of Relativity. He discusses worm holes and how to create and control them, using anti-gravity, negative energy and time dilation.

He goes through the known steps necessary to create a time dilation by connecting one point of time in relation to a certain spatial location to different time conditions in another spatial location. This involves, of course, reflections on light speed and the physical and practical limitations involved in the state of the universes as we know it.

This is fascinating reading, with both feet planted firmly on terra firma, but with the mind probing the depths and breadths of existence and possibilities within the laws of physics! Stimulating!



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A Really Interesting Book

This book is about all the different theories of time travel. It also tells different ways that time machines "could" be made but they are highly unlikely.

Paul Davies is Professor of Natural Philosophy in the Australian Centre for Astrobiology at Macquarie University. Davies is interested in the nature of time, high-energy particle physics, the foundations of quantum mechanics, the origin of life and the nature of consciousness. Davies is well known as an author, broadcaster and public lecturer. Paul writes regularly for newspapers, journals and magazines in several countries, both about science and the political and social aspects of science and technology. In 1991 Davies won the ABC Eureka Prize for the promotion of science in Australia. In 1992 he won the University of New South Wales Press Eureka Prize for his book The Mind of God, and in 1993 he was presented with an Advance Australia Award for outstanding contributions to science.

This book turned out a lot different than I thought, but I really liked it. A friend gave me the book to read and he liked it also. The book is about all the different theories of time travel and possible ways that you could make a time machine. This book was interesting, a little hard to understand, but it was never boring. I thought that this book was going to be more of a story but it turned out being an informational book about time travel. I actually did learn a lot about traveling through time and all the different theories that people like Einstein had. It also proved why time travel wouldn't be possible because of the size that the time machine would have to be. This book was a good length; it wasn't to long but it explained things enough for you to


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A Very Interesting Book

This book is about all the different theories of time travel. It also tells different ways that time machines "could" be made but they are highly unlikely.

Paul Davies is Professor of Natural Philosophy in the Australian Centre for Astrobiology at Macquarie University. Davies is interested in the nature of time, high-energy particle physics, the foundations of quantum mechanics, the origin of life and the nature of consciousness. Davies is well known as an author, broadcaster and public lecturer. Paul writes regularly for newspapers, journals and magazines in several countries, both about science and the political and social aspects of science and technology. In 1991 Davies won the ABC Eureka Prize for the promotion of science in Australia. In 1992 he won the University of New South Wales Press Eureka Prize for his book The Mind of God, and in 1993 he was presented with an Advance Australia Award for outstanding contributions to science.

This book turned out a lot different than I thought, but I really liked it. A friend gave me the book to read and he liked it also. The book is about all the different theories of time travel and possible ways that you could make a time machine. This book was interesting, a little hard to understand, but it was never boring. I thought that this book was going to be more of a story but it turned out being an informational book about time travel. I actually did learn a lot about traveling through time and all the different theories that people like Einstein had. It also proved why time travel wouldn't be possible because of the size that the time machine would have to be. This book was a good length; it wasn't to long but it explained things enough for you to


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How to build a quick tour of physical theories.

Well, I hate to ruin it for you, but Davies isn't really telling the reader "how to build a time machine" so much as he is taking advantage of a gee-whiz slice of science fiction fun to build a quick tour of the fundamental theories of modern physics.
"So can it really be done?" asks Davies, one of the most frequently cited mathematical physicists of our day. And away we go, flying through the ideas of Newton, Einstein, Gödel, Hawking, and Penrose, and leaping into wormholes in space-time. As we go, the great modern physical theories come into play one after another. Davies is good at this. Quickly treated are singularities, entropy and the arrow of time, the special and general theories of relativity, exotic matter, antigravity, the topology of space-time, quantum uncertainty, and other stuff including a bevy of time-travel paradoxes.
To be sure, the author describes time machines that 'might' work. "So can it really be done?" Again, I don't want to ruin it for you. But some reviewers seem to have come up with the wrong answer. Here's a hint, "The purpose of science is to provide a consistent picture of reality, so if a scientific theory produces genuinely paradoxical (rather that merely weird or counterintuitive) predictions, that is a very good reason for rejecting the theory" (p 123). This isn't going to be remembered as one of Davies more important books (I recommend 'The Mind of God' and 'The Matter Myth'), but this is aimed at a different audience/readership.
A fun little book.


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Great Read

This book is absolutely fabulous for anyone who wants to understand complicated physics in simple and interesting terms. Black holes, time travel, and the sun exploding are all fascinated things made simple in this great novel.


reviews: page 1, 2, 3, 4



With his rare knack for making cutting-edge theoretical science effortlessly accessible, world-renowned physicist Paul Davies has won a devoted readership with his bestselling books The Fifth Miracle, About Time, and God and the New Physics. Now Davies tackles an issue that has intrigued humankind for centuries-is time travel possible?

The answer, insists Davies, is definitely yes-once you iron out a few kinks in the space-time continuum. With tongue planted seriously in cheek, Davies explains that to visit the future, all you need is a little help from gravity and a spaceship that can travel just under the speed of light. As for returning to the past, the best bet is to find a convenient black hole equipped with a traversible worm hole-though if you're not careful you may find yourself sucked into a one-way journey to nowhere. Finally, having brilliantly laid the theoretical foundation, Davies sets out a four-stage process for assembling the time machine and getting it to work. He also addresses the ticklish question of why, if time travel is really feasible, we're not swarmed with time tourists visiting us from the future.

Wildly inventive and theoretically sound, How to Build a Time Machine is creative science at its best-illuminating, entertaining, thought provoking, and fascinating in every way.


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