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How to Build a Time Machine

3.79  ·  Rating Details ·  816 Ratings  ·  85 Reviews
With his unique knack for making cutting-edge theoretical science effortlessly accessible, world-renowned physicist Paul Davies now tackles an issue that has boggled minds 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 placed firmly in cheek, Davies explains the ...more
Paperback, 144 pages
Published March 25th 2003 by Penguin Books (first published 2001)
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قرأت هذا الكتاب لسببين
اولا لانه من تأليف عالم الفيزياء الشهير بول دايفيز و انا اثق فى اى كتاب عليه امضاء بول دايفيز من انه سيكون كتاب ممتع و مفيد فى الوقت ذاته
و ثانيا لاننى وجدت انه لا يوجد اى review عربى للكتاب
كلها تعليقات اجنبية و كأنه لا يوجد منا لعرب من هو مهتم بقرأة كتاب فيزيائى
ناهيك طبعا..عن كم الاستظراف و السخرية الذى وجدته من الاصدقاء المصريين وا لعرب... بسبب عنوان الكتاب..السذج فقط هم من يحكمون على كتاب من عنوانه.. السذج فقط هم من يسمعوا عنوان ال
Joanne G.
Contrary to the misleading title, this book does not contain any helpful schematics or step-by-step instructions to build a time machine. Once I recovered from my overwhelming disappointment, I enjoyed the simple (though deep) discussions of the different venues that could result in time travel.

As an avid science-fiction reader, I've nearly taken the idea of time travel for granted. The book cleared up some misconceptions. I hadn't realized that traveling backwards in time would be more problem
Sep 10, 2008 Trevor rated it liked it
Shelves: science
A very dear friend of mine bought this for me – and she was concerned that I might have read it already. I’ve read a couple of Davies’ books – but not this one. I can hardly remember what the others were called now – but they weren’t called How to Build a Time Machine of that I’m quite certain.

One of the others was also about time and also gave a rather involved discussion on why zapping off at the speed of light is even better than Oil of Olay if you are after younger looking skin. I’ve never u
عمر الحمادي
Apr 25, 2016 عمر الحمادي rated it really liked it

من يعتقد أن اللحظة الحاضرة هي نفس اللحظة عبر الكون كله فإنه مخطيء خطأً شديداً، ولا يجوز اعتقاد هذا الأمر بعد تحطيم نظرية النسبية لإينشتاين لنظرية نيوتن في المكان و الزمان، فالزمن نسبي وليس مطلق وكوني كما يردد الحس العام للناس، فالزمن يتمدد ويستطيل وينكمش، فلو فرضنا أنك في ذهبت ورجعت بالطائرة إلى اليابان وأنا مازلت في مكاني، فإن تدفق الزمن لكلانا هو نفس الشيء إلا أنه في الواقع سيكون أقل قليلاً بالنسبة لي، وهنا نتحدث عن الزمن الفيزيائي الذي يمكن قياسه بمنبهات لا عقول لها وتستطيع التقاط فروقات تصل
May 30, 2013 Luke rated it it was amazing  ·  review of another edition
Wonderfully brief, Davies turns in an easily-finished primer on the mechanics behind time travel, and the implications of taking such a trip - assuming you're not spaghettified in the process.

This is a deep subject, and while sci-fi is constantly referenced, the author manages to convey some of the major points with a subtlety that aids the physics clod (such as myself) who can find Hawking's books a little intimidating.

Davies has produced something that makes the gee gosh parts of time and sp
May 22, 2013 Raphael rated it it was amazing
This book is really interesting. At times can be confusing, but is mostly really enjoyable. I have always dreamed of time travel, and this book was really good for me to read. It helped me understand a lot of parts of my theory. I would suggest this book if you really want to get sucked into an amazing philosophic idea.
Jan 03, 2013 Lily rated it liked it  ·  review of another edition
Surprisingly brief - it was all well and good until Davies started blabbering about the quantum multiverse, inflators and negative energy..then I got kind of confused. But it was a very curious read, (I'll recommend this to anyone who wants to get a clean-cut summary on the subject.)
May 09, 2016 Pedro rated it really liked it  ·  review of another edition
penso nunca ter conseguido imaginar que isto seria possível em termos físicos!
apesar deste livro ser de divulgação, mesmo para o leitor menos preparado dara uma boa ideia sobre viagens no tempo e a(possível) física por de trás.
Carlos Reges
Oct 26, 2016 Carlos Reges rated it really liked it
Tardé mucho con este libro, pero es que hay que desmenuzarlo para entender lo complicado que es captar la física cuántica en palabras simples.
Me gustó el capítulo sobre teorías y paradojas sobre cómo se debe viajar en el tiempo. Lo recomiendo para quienes quieran conocer cómo se debe hacer para viajar al pasado.

Paul Davies [PD] es uno de los mejores divulgadores de ciencia que he leído. Le conocí gracias a los libros de ciencia de Salvat, con “El Universo desbocado” y “Dios y la nueva física”, grandes títulos de divulgación. Mi libro favorito sigue siendo “Sobre el tiempo”, en el que habla del tiempo (no del meteorológico, sino del cronológico) desde el punto de vista físico. Impresionante libro. Recuerdo que cuando me fui de mochilero a dar la vuelta a Australia hace cuatro años pasé por la Universida

Tim Pendry
May 07, 2016 Tim Pendry rated it liked it  ·  review of another edition
Shelves: science

This is quite a good short summary of some of the early twenty-first century thought experiments in time and space. Cosmology and physics are never easy subjects. Readers may get a bit lost in places but if it is possible to be clear then Davies does a good job in being so.

Basically we can travel forward in time by whizzing out into space near the speed of light for a few years and then returning decades in the future - but even this relatively low tech (by the standards of the book) wheeze is n
Lukasz Pruski
Apr 21, 2015 Lukasz Pruski rated it liked it
I quite liked Paul Davies' "The Eerie Silence: Renewing Our Search for Alien Intelligence", which I review here . I have not found my second book by this British physicist and famous popularizer of science, "How to Build a Time Machine", as interesting. Also, while the first part of the book, which mainly focuses on "spacetime", is clear and convincing, the part dedicated mostly to wormholes seems to do less than stellar a job.

Dr. Davies first debunks the commonsense picture of time that we use
May 28, 2009 David rated it really liked it
This was a tough book to get through. Its a beginner's primer to Einsteinian and Quantum physics, all in a tiny 125 pages. The purpose of the book is to incite curiosity: to make the reader want to know more, to finish it, and need to know more. Mission accomplished!

As a primer, its not a dense book, and it is well-written for laymen readers, but the concepts themselves, even simply and summarily explained, are very different from our everyday 'familiar and observable' way we experience reality
Abd Rsh
Apr 05, 2016 Abd Rsh rated it it was amazing  ·  review of another edition
شرح الدكتور بول ديفيز في هذا الكتاب عدد كبير من المبادئ والمفاهيم مبتدئاً بالمفاهيم الأساسية عن الفيزياء الكمية والنظرية النسبية وعدد كبير من الأفكار الفيزيائية لكبار العلماء.
برأيي الكتاب مفيد جداً و يحوي الكثير من المعلومات القيمة والتي لن يستطيع معرفتها الشخص العادي فقط من متابعته للمقالات العلمية ..
انصح كل شخص يحب الاطلاع على هذا الباب الواسع من العلم بأن يقرأ هذا الكتاب بتمعن كبير وبتركيز كبير وان لايتعجل في قرائته.
قام الكاتب بربط الأفكار التي طرحها بشكل ممتاز لدرجة أنك قد تحتاج أن تعود للخل
Oct 04, 2009 Brian rated it it was ok
when i was younger i read a book about the possibilities of time travel and how to build a time machine. i brought this book with me thinking that it was the same one. not so.

the one i read in my youth was a how to book of many different amazing things, the crown jewel was time travel, but it also explained how ancient civilizations communicated with each other across the globe. it supposed that the pyramids were really more like ancient cell phone towers and the civilizations with pyramids coul
Jan 03, 2008 Teresa rated it really liked it
I daydream a lot and I highly believe in the possibility of time travel.
If I could travel back in time I would like to go back to the 1800s and meet Dostoevsky. I want to ask him about Raskolnikov and the use of voice in the novel.
I would also like to go cak in time to meet James Joyce. I want to ask him about the stream of conciousness and ask him to explain Finnegan's Wake to me.
I want to go back and meet Charles Dickens so that he can teach me to write with exceptional details.
Well, of cours
Sara Poole
Aug 10, 2009 Sara Poole rated it really liked it
Perhaps it was inevitable that my fondness for novels involving time travel would lead me to this slim but fascinating non-fiction work by physicist, Paul Davies. Despite the provocative title, Davies doesn’t actually give step-by-step instructions for building a time machine in your garage, more’s the pity. But he does explain in plain English why we’re already time travelers (moving toward the future at the stately pace of one second per second) and how the universe just might allow us to do ...more
aqeel fadil
Nov 06, 2014 aqeel fadil rated it it was amazing  ·  review of another edition
عند قرائتك لعنوان الكتاب سيتبادر الى ذهنك انه يحتوي على خريطه هندسيه لصنع هذه الاله ماعليك سوى اخذها الى الورشه والبدء ببنائها
حقيقه الامر ليست بهذه البساطه فأله الزمن التي يتحدث عنها بول ديفيز هذا العالم الرائع صاحب المؤلفات الجميله من الصعب بنائها وابعض اجزائها من الصعب تكوينها فهي تحتاج الى طاقه يستحيل او من الصعب جداً الحصول عليها الطاقه السالبه
وأما الوقت الذي تحتاجه لكي تعمل يتراح بين دقائق الى مليارات السنين
ولكنه يأمل مع تقدم العلم والحضاره يمكن ايجاد وسائل يمكن من خلالها توفير الطاقه والوس
Hugh Chatfield
It is kind of interesting to find out that although we don't have the technologies to carry this out - we can think of, and show how to construct such a device. There is nothing in Physics that says this can't be done.

I'd be quite happy to only discover how to send and detect signals going backward in time. Maxwell's equations show two solutions when solved. One is the forward in time e/m that we are all familiar with and make use of. The other is a backward in time e/m wave. Typically this sol
Nuno Vargas
Sep 29, 2012 Nuno Vargas rated it liked it
This is an interesting book, which starts out with a practical idea in mind. The text is very clear, and not difficult to follow. Unfortunately by the end of the book I was not much convinced that, even if the theory is sound, we can ever actually build a time machine. But I liked it in general and would have given it 3,5 stars if possible.
Unlike other science books I've read, this one is quite short and very fast to read. That's because it glances over some of the theory involved, just using it
Jan 06, 2014 Rosalind rated it really liked it
Not my next classroom science project, but definitely an enjoyable read and a fun opportunity to think about modern physics. The style of the writing and tone of the book made for a smooth read, and there are a lot of diagrams that provide helpful illustrations of what the author is talking about. He also provides cross-references to different parts of the book to remind the reader of other things he has talked about, which is especially helpful given the complexity of the topics. I think this ...more
Sep 12, 2014 Nina rated it liked it
I borrowed this book out as I wanted some more understanding on the science of time travel. I'm working on a story where my characters time-travel, and although it is magical based, I wished for scientific explanations, theories and laws to combine with it. This was a good book to come to.
It doesn't give step-by-step instructions of what to do, but rather goes into theoretical physics and ideas on how one COULD time travel (if one had the resources).
I'm not particularly physics or science savv
Jul 03, 2012 Aaron rated it really liked it
Shelves: non-fiction, science
Paul Davies concisely describes the concepts of time, time travel, and time machines, giving a fairly simple recipe for creating a working time machine out of a wormhole. Simple, but difficult considering the amounts of energy and type of fuel required, both of which will prevent time machine experimentation for a long time (if not forever). I especially enjoyed the discussion on relativity of simultaneity, which is a truly mind-boggling concept. A short but very informative and easy to digest ...more
Feb 25, 2012 Mike rated it really liked it  ·  review of another edition
So close. I was so close to following the book all the way through until he got to virtual photons and negative energy. I got a bit lost then.

A surprisingly short book, of the 135 pages every third page or so is an illustration of dubious helpfulness (and some atrocious portraits). I'd like him to have spent more time on the 'How to build' chapter. You can't just say "Tow the end of the wormhole next to a neutron star" without providing some extra practical information!

Slowly, I'm getting the ha
Aug 22, 2012 Ruth rated it it was amazing
Read in further pursuit of my sudden desire to understand the implications of Einstein's Theory of Relativity, specifically the Relativity of Simultaneity. (No, really.)

It speaks to the author's clarity and wit that even I, who have no real affinity for science, not only understood the majority of this book but downright enjoyed it, too. This is physics as I would loved to have had it explained to me in high school.
Andrea LeClair
I took this out of the library the other day in a very determined manner: I was going to learn about physics. This may not, however, be the book to help me meet that goal, since in the first paragraph, the author declares that other people have better explained concepts of relativity and he was jumping straight into the time travel part. Still, the book seems both fun and, more importantly, accessible to someone whose only real grasp of physics was gained from sci-fi television shows.
Jan 27, 2009 Jef rated it it was amazing
Theoretically it IS possible to travel backward in time. Various methods have been proposed to avoid the resultant paradoxes that might ensue if this were to happen. My favorite is the many-worlds interpretation of from quantum theory, modified a bit to take into account the necessity of having an observer collapse the potential. I think that something like that not only can happen, it does happen all the time.

Dustin Jennings
May 14, 2012 Dustin Jennings rated it really liked it
Very quick and easy read, which is good for me. Some of the concepts are tough to grasp, but Davies simplifies things well. Also, some of his explanations of how things work in quantum physics are memorable and simple to digest, which makes it fun to regurgitate the facts and open up some conversation.
Alex Johnston
Dec 09, 2013 Alex Johnston rated it really liked it
A fascinating romp through some of the many fascinating topics of theoretical physics. Although a true understanding of all of these concepts requires more study, Davies offers simple explanations to the remarkable phenomena involved in the possible making and implementation of a time machine. From wormholes to exotic matter, this intro to the infinite is definitely worth the read.
Aug 14, 2013 Stefanie rated it liked it
See you all yesterday! Ha, just kidding. This is an interesting read that breaks down the science of time travel so that even a liberal arts major like me can understand. Added bonus: I now know what the Einstein-Rosen bridge is and what kind of power the Tesseract might be generating in The Avengers.
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Time Travel: How to Build a Time Machine 1 28 Oct 16, 2013 04:26AM  
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Paul Charles William Davies AM is a British-born physicist, writer and broadcaster, currently a professor at Arizona State University as well as the Director of BEYOND: Center for Fundamental Concepts in Science. He has held previous academic appointments at the University of Cambridge, University of London, University of Newcastle upon Tyne, University of Adelaide and Macquarie University. His re ...more
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