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The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos

4.05  ·  Rating details ·  13,892 Ratings  ·  607 Reviews
The bestselling author of The Elegant Universe and The Fabric of the Cosmos tackles perhaps the most mind-bending question in modern physics and cosmology: Is our universe the only universe?

There was a time when "universe" meant all there is. Everything. Yet, a number of theories are converging on the possibility that our universe may be but one among many parallel univers
Paperback, 416 pages
Published November 1st 2011 by Vintage (first published January 25th 2011)
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Aidan I haven't read this one, but I have read two other books by Greene: The Elegant Universe, and The Fabric of the Cosmos. Hidden Reality is his latest…moreI haven't read this one, but I have read two other books by Greene: The Elegant Universe, and The Fabric of the Cosmos. Hidden Reality is his latest of the three. He is generally easy to understand, and he explains things lucidly and in a clear way. I'd expect this one to be the same.

If you haven't read either The Elegant Universe or The Fabric of the Cosmos, I recommend checking them out. They are both exceptional works. Your world will never be the same after reading Greene. He made me understand general relativity, something I struggled with for years, before stumbling upon his The Elegant Universe. And his descriptions of and implications on the tenets of string theory are very impressive.(less)
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Dec 14, 2010 rated it really liked it  ·  review of another edition
So my buddy Ryan introduced me and Jo to his new girlfriend this past weekend and she's a mathematician (who is clearly not very good at it, because Ryan with a girlfriend doesn't add up - ZING!), so I was like "Do you think we're all avatars in a big futuristic game of The Sims?" and her face just lit up, like "I've been waiting for someone to ask me this all my life!" She is adorable, and we geeked out about parallel universes for like half an hour while Ryan and Jo made big exaggerated sighin ...more
Apr 27, 2011 rated it really liked it  ·  review of another edition
Recommended to Manny by: Mary
Shelves: science, multiverse
I've now read three books about the multiverse in rapid succession: the first two were Rees's Before The Beginning (1996) and Davies's The Goldilocks Enigma (2007). This one came out just a few months ago, so I'm hopefully up to date for the moment.

Well: I'm starting to feel quite familiar with the arguments, but each book has an interestingly different slant. Rees concentrates on presenting the experimental evidence for the existence of other universes - basically, the physical constants of
Nov 05, 2017 rated it it was amazing  ·  review of another edition
Shelves: science
Probably one of the most comprehensive and comprehensible books on basically everything I have read. From classic physics to Einstein and string theory to reality are explained. This is definitely not a book for non-science people. Greene does, frequently, give the reader a chance to jump ahead if they do not want to read about the explanation of the theory presented. Greene will give a summary and then go into the science the reader has the choice of listening tot he details or accepting the th ...more
Muhammad Shakhawat Hossain
নৃতততববিদযা মতে মানব সভযতার জনম ২০,০০০-৪৪,০০০ বছর আগে। এই সময়টার ভেতর মানুষ খুব ধীরে ধীরে নতুন নতুন পরযুকতির উদভাবন করেছে। মানুষ আগুন জবালাতে শিখেছে, হাড় দিয়ে হাতিয়ার তৈরী করেছে, পশুর সাথে হুটোপাটি না করেও সরেফ বিষ দিয়েই যে অনেক কম কলেশে শিকার করে ফেলা যায় তা জেনেছে, পাথুরে গুহার গায়ে আঁচড় দিয়ে ছবি এঁকেছে...। এভাবে এক সময় মানুষ জায়গার পরিমাপের নিখুঁত হিসেব করতেও শিখে গেলো। ভূখণডের কতখানি নিয়ে একটি সামরাজয বা দেশ হয় তার আনদাজ পেলো। এত এত সব বিদযা একটু একটু করে অরজন করে এই বড়জোর হাজার পাঁচেক বছর আ ...more
Jason Furman
Aug 16, 2011 rated it it was amazing  ·  review of another edition
Brian Greene really is one of the best popular science writers. His books give you a real sense of being guided by someone who genuinely knows what they're talking about, who uses metaphors effectively, and who effectively weaves the traditional material in with the new points he is making. He also approaches science with curiosity untainted by dogmatism. He is very much open to speculation, but equally open to the speculation not panning out.

This book is about different concepts of the Multiver
Outstanding update of the current status of modern physics and the projections of parallel universes from various advances. I would have loved to have Greene for a teacher in college. The tour is suitable for laymen with some understanding of physics, as he provides plenty of concrete examples to explain challenging concepts and gives an opportunity to skip more technical sections. For the more knowledgeable reader, a copious appendix is available, replete with the relevant math equations.

Jan 23, 2017 rated it it was amazing  ·  review of another edition
Shelves: science
Brian = bae. Definitely one of the more accessible cosmology writers of today. Any book discussing quantum field theory and string theory is going to require your undivided attention, of course, but it’s much more readable than many others, especially if you’re fond of analogies.

Turns out, there’s lots of theories that give rise to the possibility of alternate realities:

Theory 1, aka Quilted Multiverse: If the universe is infinite (it might not be, but if it is) then at some point in the distan
Mary Overton
It took me 8 months to read this book. My system is to read until my head is ready to explode, then stop for a month, then restart at the beginning. On the 4th attempt, I made it to the last page (or rather, Kindle location.) guarantee of how much was actually understood. This is a book that pried open my mind. The brain is sore and ecstatic from the experience.

From the last chapter,
Table 11.1 Summary of Various Versions of Parallel Universes
1. Quilted Multiverse: Conditions in an infinite
This is a pretty dense book. Some of the footnotes have footnotes!

I'm sure it must be very difficult for an author of a popular science book to walk the line between, on the one hand, providing enough technical information to make the arguments cogent, and on the other, miring the reader in a bog of difficult concepts and facts. My hat's off to Dr. Greene for giving it a try on some of the most out-there ideas that can be imagined.

Some very interesting ideas, but ultimately, for me this was al
Keith Akers
Mar 03, 2011 rated it really liked it  ·  review of another edition
This was a good book. For a popularization, this had some pretty heavy science in it. I'm a pretty smart guy and will have to re-read it to really have a better understanding. Greene really is a good writer, because even when you don't quite understand what he's talking about, he gives you enough of the broad overview so that you can go to the next section and feel that you haven't missed anything critical.

The section on "quilted multiverses" was pretty straightforward and I can claim to have un
Mike (the Paladin)
The first book I had by Brian Greene was The Fabric of the Cosmos. I got it not long after it was releases and a friend asked me if he could borrow it not long after I received it in the mail, before I'd read it.

I said yes.

I didn't get the book back for several years, Dr. Greene had written more by then. Oh well.

This book (as is Dr. Greene's wont) is an attempt to take highly technical and advanced ideas and make them understandable to "us", "we", "the great unwashed", "the masses". I suppose i
Apr 16, 2011 rated it really liked it  ·  review of another edition
Shelves: science
The first half of this book is an expansion on some of the various multiverse concepts mentioned only briefly in Greene's earlier The Elegant Universe and The Fabric of the Cosmos (which overlap each other a little). I was an enthusiastic reader of those, and enjoyed this deeper look at what the scientific basis of those might be, in somewhat the same style. But for the second half of the book, I want to mention specific chapters, as I feel the value of the writing swings wildly.

7. Science and t
Feb 14, 2011 rated it really liked it  ·  review of another edition
Recommends it for: Anyone who likes physics or science fiction
I always enjoy looking at scientific concepts through the lens of the fantastic or peculiar, so this exploration of parallel universes by popular physicist Brian Greene is perfect for me. Written in his usual clear, funny style, Greene naturally discusses string theory, relativity, number theory with respect to infinities, quantum theory, and numerous other scientific concepts. Instead of simply discussing these theories, however, we get to look at various proposals of multiple universes. From t ...more
Jan 28, 2011 rated it did not like it  ·  review of another edition
I really am a huge fan of Brian Greene. I've read both "The Elegant Universe" and "The Fabric of the Cosmos" and find his writing simply astonishing. With complete sympathy for readers without mathematical acumen, he explains concepts like quantum physics, the theory of relativity, the four major forces including gravity with such precision, and wit, that I found myself gasping for breath as I felt like I was reaching groundbreaking depths of understanding of how the universe works on almost eve ...more
Nov 15, 2011 rated it liked it  ·  review of another edition
Shelves: physics
I purchased this on the strength of Brian Greene's past works and find him to be consistent in his clarity of explanation.Although I had a few sticky moments with some elements of string theory and the explanation of the concept of infinity, on the whole it went well.I didn't get the same revelatory experience I got from "Fabric of the Cosmos",as most of the multiverse theories are extensions of areas he has covered previously and as the book is written with the assumption of little or no prior ...more
Cassandra Kay Silva
Finally! Brian Greene you are the master at delivering exactly what I have naturally been pondering and lack the scientific mind to undertake. Thank heavens it wasn't another science book that I had to sit through the whole of physics from Einstein onward. Way to know your audience. We are sick of the constant repeating of every major scientific breakthrough of modern times. We have heard it all a dozen times, we know the history and want to know what is going on now! Yet again you deliver in yo ...more
Much of this book describes speculative hypotheses about parallel universes. Some of the explanations--for example, the bubble universes--really made my head hurt. The explanation for why string theory requires ten space-time dimensions seems a bit glib to me. Some of the analogies--imagine a bunch of clones of Cartman from South Park standing atop mountain peaks--are just too silly to take seriously. The description of black holes and entropy is fascinating. Some parts of the book are rather ph ...more
Dec 11, 2011 rated it it was ok  ·  review of another edition
Shelves: non-fiction
I wanted to get a glimpse of the current state of physics' understanding and theories about our universe and possible multiverses, mostly after an interesting piece on Radiolab a few months ago. I felt like this book got bogged down in string theory, and I have to admit the mechanics of the holographic universe escaped me. Still, I feel like I understand more about how theories of multiverses originate, and where they might be going. Not the most fun read, and I was expecting less theoretical ph ...more
Ami Iida
Feb 24, 2015 rated it it was amazing  ·  review of another edition
Recommends it for: interested in quantum
Shelves: physics
This book has been covering the important items of quantum mechanics.
essential reading quantum book.

In the text it has been described the basics of quantum mechanics.
Apr 19, 2017 rated it it was amazing  ·  review of another edition
Shelves: favorites
I am sold to Brian Greene after reading this one.I am fond of his simplicity for writing such a book.I was looking for such a book for quite sometime and when I learned about it I instantly decided to read it. It took me quite a time to read this book,to process it.It is a good book for the people who have little knowledge in this field.Want to broaden your knowledge on the topics like Multiverse,string theory? Read this book.
The Pirate Ghost (Formerly known as the Curmudgeon)
Needed more "Schrodinger's Cat and less Matrix."

Okay, I liked the first 66% of the book. Greene takes the time to go over, and over..(and over).... (and over) some of the same mathmatical points. It could get monotonous but in the first half to 2/3rds of the book he managed to add a little bit more "new stuff" to each repitition.

It did help me understand string theory and that there is at least mathamatical (theoretical?) support for multiple universes and the book did a good job of explaining
Dec 11, 2011 rated it it was amazing  ·  review of another edition
Shelves: science, 2012
This book wouldn't be great without his first two. Or maybe it would, but it would seem like a fantasy ride in some bologna-artist's woo-science book. It's basically a survey of the different multiverse ideas out there - all the different ways people have dreamed up multiple universes.

Given the scientific gravitas Brian Greene is able to bring, though, one has to take these ideas seriously. At least, as seriously as one can. I'm not a physicist, but I have taken a statistics course or two, and t
Lee (Rocky)
I think I may just be too dumb for books like this. There are parts I understand and that intrigue me, but then suddenly things get too complicated for me to wrap my head around. This is mostly, but not exclusively, true of the sections that delve deeply into math (though the author, thankfully, relegates a lot of the math to notes), but there are plenty of non-math sections that were equally incomprehensible to me. Some of the notes are useful for clarification, but others just muddy the waters ...more
Good grasp and explanation of many concepts. Some of the good stuff is buried in the notes, though. Overuses the anthropic principle in the later chapters, which explains nothing. A solid book over all.
Feb 10, 2012 rated it really liked it  ·  review of another edition
Shelves: science

--The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos

Suggestions for Further Reading
Mohamed al-Jamri
Notes I took while reading the book:

Read by author

About the multiverse.

Chapter 1: The bounds of reality, on parallel worlds.

Clears what we mean by universe and multiverse. varieties of parallel worlds.

Probabilistic nature of QM and the many worlds interpretation of it.

Many paths leading to the multiverse: QM, inflation, infinite cosmos, string theory.

He's open about the speculative nature of the topic. Honest from the beginning. [he was also honest in The Elegant Universe documentary - maybe I s
Aug 23, 2017 rated it really liked it
Shelves: nonfiction, science
Really enjoyed this, especially since it introduced me to string theory which I always thought would be so much more complicated! But it turns out to be such a beautiful concept.

Parallel universes will always be one of those things that interest people I think, and I'm glad that I can now sort of talk about them intelligently. My favorite theories are the simulation one, the cyclic multiverse, and quilted multiverse, with maybe brane worlds thrown in there.

My only problems with this book were 1
Umair Khan
Feb 20, 2013 rated it really liked it  ·  review of another edition
In The Hidden Reality, celebrated theoretical physicist Brian Greene explains the mind-boggling idea of a ‘Multiverse’ (plural of universe). A professor of physics at Columbia University, Greene is well-known for his two earlier works on popular science, The Elegant Universe and The Fabric of the Cosmos which sought to explain, among other things, the very nature of space-time. But The Hidden Reality, in explicating the idea of multiple realities, shows the layperson something that has never bef ...more
This is a pretty good read.
Greene does digress into silly analogies and painfully remedial mathematical lessons from time to time.
Nevertheless, the many flavors of conceivable "multiverses" are an interesting and quite modern topic.
Greene acts like a used car salesman at times, using syrupy language to give speculation more than it's due.

Worst of all is his "giving equal time" to the anthropic principle!
Anthropic arguments are nothing more than an "I give up" approach to explaining the yet-to-be
Jan 02, 2012 rated it really liked it  ·  review of another edition
Shelves: science
This book presents nine different theories supporting the idea of parallel universes. These are consistent with current physics theory and observational data. At this time there is not enough data to discern which one if any might in fact be a true representation of reality.
One of the more interesting theories to me is the Quilted Multiverse.
An infinite universe can be divided into a series of spherical patches each the size of the cosmic horizon. The cosmic horizon is the distance that light c
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Science and Inquiry: September 2012 - Hidden Reality 55 176 Sep 18, 2014 12:51PM  
Madison Mega-Mara...: # 62 - The Hidden Reality 1 1 Aug 23, 2014 07:19AM  
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Brian Greene is an American theoretical physicist and one of the best-known string theorists. He has been a professor of physics and mathematics at Columbia University since 1996. He has become known to a wider audience through his books for the general public and a related PBS television special.
More about Brian Greene...
“If there is a lot of matter, gravity will cause space to curve back on itself, yielding the spherical shape. If there is little matter, space is free to flare outward in the Pringles shape. And if there is just the right amount of matter, space will have zero curvature.*” 7 likes
“When you realize that quantum mechanics underlies all physical processes, from the fusing of atoms in the sun to the neural firings that constitutes the stuff of thought, the far-reaching implications of the proposal become apparent. It says that there’s no such thing as a road untraveled. Yet each such road—each reality—is hidden from all others.” 6 likes
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