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Black Holes: The Key to Understanding the Universe

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Also, as a reader who is not using these texts for any academic purposes, I think Cox’s writing is so much easier to ‘digest’ (and much more enjoyable in general) than Hawking’s (only comparing this to a few of Hawking’s books that I’ve previously read). I think it might be important to clarify that – I’m not comparing them based on ‘who’s the better (astro)physicist’ or whose ‘work’ was more ‘important’; but only of whose writing/books I had found more ‘enjoyable’. Hope that helps?

The authors try to describe the spacetime by something called Penrose diagrams. I think I did a good job understanding it to some extent. But when it came to quantum entanglement in the last chapters, I kind of gave up. Because the equations involved with those chapters were more complex than the rest. This is definitely a hard read. I had to read some chapters again and again to understand ( not fully though). So if you are going to read this book, and understand it thoroughly, you should spend some time on it. My reason for being sceptical is that I assumed this book would be a fairly watered-down affair with the usual dose of hand-wavy analogies that end up obscuring or misconstruing most of the real physics. Well, I was very wrong! All of this disregards entirely that I am already sort of tied up with a pseudo-career in a different scientific discipline and do not relish the thought of attending university again. Nor am I particularly skilled at focussing on multiple things, fond of starting over, or withholding anything of value from the theoretical physicists that they haven't already got covered.

While saying this, I think the authors try their best to convey these complex ideas to the layman. I have read considerable amount of books about the universe and this is the hardest so far. But even though this it's hard to read, I think we can see through these theories from a mathematical point of view. Because at the end of the day it's all about maths.

It’s always tempting to bask in the self-congratulatory delusion that if I just really concentrate on something hard enough I’d be able to understand it. But this book proved me wrong from the very first spacetime Penrose diagram that slowly sent my protesting brain over the event horizon and to the singularity while being simultaneously vaporized and spaghettified. I suppose owning a “Schrödinger’s cat: Wanted dead and alive” t-shirt didn’t actually qualify me to understand this book (although it certainly increased my nerd cred).There’s an old saying I think by Stephen Hawking that every equation you include in a popular level science book will half the effective book sales. Well, Cox and Forshaw deserve credit for taking a brave plunge (and by my estimate forgoing 99.999999% of their book sales based on Hawking’s formula) because one of the highlights of this book is the scattering of equations that are accompanied by careful explanation and insight. The first sign I was wrong is when I noticed a myriad of Penrose diagrams throughout the book - that is not something I’ve see in popular science books before. Sometimes you will get spacetime diagrams and usually very simple ones at that. As someone who studied physics 20 years ago as an undergraduate (and took a subject on relativity) I can honestly say I’d never seen a Penrose diagram before and I found them a really useful learning tool in the book. As I said, I’ve read a lot of books on this topic and adjacent ones (Thorne, Greene, Smolin, Carrol, etc) and I was genuinely glued to this one. At the heart of our galaxy lies a monster so deadly, not even light can escape its grasp. Its secrets lie waiting to be discovered. It’s time to explore our universe’s most mysterious inhabitants This is the ultimate vindication of research for research’s sake: two of the biggest problems in science and technology have turned out to be intimately related. The challenge of building a quantum computer is very similar to the challenge of writing down the correct theory of quantum gravity. This is one reason why it is vital that we continue to support the most esoteric scientific endeavours. Nobody could have predicted such a link.

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