Goodreads helps you keep track of books you want to read.
Start by marking “How to Build a Time Machine” as Want to Read:
How to Build a Time Machine
Enlarge cover
Rate this book
Clear rating
Open Preview

How to Build a Time Machine

3.8  ·  Rating Details ·  784 Ratings  ·  82 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 th ...more
Paperback, 144 pages
Published March 25th 2003 by Penguin Books (first published 2001)
More Details... edit details

Friend Reviews

To see what your friends thought of this book, please sign up.

Reader Q&A

To ask other readers questions about How to Build a Time Machine, please sign up.

Be the first to ask a question about How to Build a Time Machine

Community Reviews

(showing 1-30 of 1,636)
filter  |  sort: default (?)  |  Rating Details
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
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
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
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.
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
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
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
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
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
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.
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
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.)
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
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

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

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
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 f ...more
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 i ...more
This was a fun read, mostly centred around wormholes. It shows how it is relatively easy to travel forwards to the future, but not so easy to travel to the past. Mentions of String and M- theory, various paradoxes, and references some of the greats in science and literature, with a short bibliography at the back.
Aaron Dietz
Dec 06, 2014 Aaron Dietz rated it really liked it
A decent summary of how to construct a wormhole but of course it's stuck in the ol' conundrum: it can't REALLY explain how without getting too technical, but it doesn't want to get too technical. I would have preferred technical (give me the equations and everything!), but still a fun look at the subject.
Could have used a little more mathematical rigour, but I understand that this book is geared towards a general audience, with maybe an O level understanding of both maths and physics. I love the cartoons and the survey of books and movies on time travel.
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
Alex Daniel
Jan 01, 2016 Alex Daniel rated it it was ok
Extremely brief with explanations that aren't quite as good as what Susskind, Hawking, or Greene provide for similar topics. Figures are nearly always irrelevant filler. Interesting concepts hindered by fluff.
Sep 13, 2014 Abdulsattar rated it it was ok
في الحقيقة لم افهم الا القليل من هذه النظريات الفيزيائية الخيالية .
مبدأ اللا يقين هو كل ما بمكن ان تركز عليه بعد كل هذه القراءة يعني ما حدا عرفان شي ):
McArthur Library Staff Picks
Pretty essential reading for lovers of science fiction...takes the thoughts and theories and boils them down to basics! Engaging and interesting, complex but not incomprehensible. Fascinating stuff! (*Allons-y!*)
Aug 16, 2015 Ching rated it really liked it
why is this universe rather than some other
Aug 22, 2015 Ahmed rated it it was ok
كتاب أكثر من رائع لكن معقد كثير
« previous 1 3 4 5 6 7 8 9 54 55 next »
topics  posts  views  last activity   
Time Travel: How to Build a Time Machine 1 28 Oct 16, 2013 04:26AM  
  • The Future of Spacetime
  • Time: A Traveler's Guide
  • Time Travel in Einstein's Universe: The Physical Possibilities of Travel Through Time
  • Introducing Time (Introducing (Icon))
  • In Search of the Edge of Time: Black Holes, White Holes, Wormholes
  • Faust in Copenhagen: A Struggle for the Soul of Physics
  • Nature's Numbers: The Unreal Reality Of Mathematics
  • The Universe Next Door: The Making of Tomorrow's Science
  • Great Physicists: The Life and Times of Leading Physicists from Galileo to Hawking
  • Time Traveler: A Scientist's Personal Mission to Make Time Travel a Reality
  • Uncentering the Earth: Copernicus and The Revolutions of the Heavenly Spheres
  • The Life of the Cosmos
  • The Physics of Superheroes
  • The Infinity Puzzle: Quantum Field Theory and the Hunt for an Orderly Universe
  • Universe: The Definitive Visual Guide
  • Spacetime and Geometry: An Introduction to General Relativity
  • The Origin Of The Universe
  • Alkemins eviga eld (Maria Wern #12)
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
More about Paul Davies...

Share This Book