I focus on fiction, sci-fi, fantasy, science, history, politics and read a lot. I try to review everything I read.
Great ideas and great narration makes this a great audio book. The last quarter of this book has some of the most interesting ideas in physics I have heard. I think these ideas are, by far, the most likely to lead to progress in physics. The first three-quarters is good, but is just a nice rehash similar to a bunch of other speculative physics books covering a brief history of cosmology leading to the theory of inflation and various levels of multiple universes, Boltzmann brains and such, finally culminating in the Measure Problem (one cannot assign consistent probabilities to infinite sets). Then the book gets really interesting! The author proposes that math does not model the universe, but that math IS the universe. The relations defined by a mathematical structure is all that is needed for us to believe all we see and feel is real. Nothing physical is needed. I really thought I was alone in being a strong proponent of this Mathematical Universe idea, so I have quite pleasantly surprised to find this excellent presentation. I was led to my conclusions by a much different path (Bell’s Theorem & Bell Test Experiments) and take these ideas to even greater extremes than Tegmark, but this is the best (the only?) popular presentations of these ideas I have seen.
It may just be awkward editing or just these ideas are heady stuff, but by the end of the book Tegmark seems a bit schizophrenic. He seems to reject continuums and infinities and randomness as unreal (which is what I think), but then he continues to refer to, and use, these as if they were real. Also a good new model in fundamental physics should address multiple issues in physics, but Tegmark does not use his ideas of the Mathematical Universe to clarify the understanding of quantum mechanics (particularly Bell’s Theorem) and the problem linking General Relativity and Quantum mechanics. I think Tegmark underestimated the depth of the Measure Problem. The underlying problem is in any reality, it is simply not possible to take a random sample from an infinite set. Thus any assignment of probability to such constructs is nonsense. Tegmark seems to still be hoping for a resolution of the Measure Problem.
The author has a really pleasant way of covering the history of cosmology, making the story like a mystery novel, using detective work to explain one mystery after another. Yet what makes this book really worth reading is the last quarter where the ideas about the Mathematical Universe are explored. I suspect that in a few hundred years the conception of the Mathematical Universe will be considered the great turning point leading to a final, simple and beautiful, Theory of Everything.
This is a pleasant story of some of the characters and events in astrophysics over the last few decades with a focus on recent data showing the expansion of the universe is unexpectedly accelerating. The characters presented are pleasure to listen to and the level of technical detail is nice for a general audience without being boring to a technical reader. The narration is really good for this kind of material.
This is quite an unusual science book, quaint and pleasant. The author’s love of relativity clearly comes through in the rich writing and narration. The book contains yet another history of modern physics, but is unusual in having General Relativity as the focal point of the historical developments. This is unusual because General Relativity wasn’t actually such a focal point, quantum physics and particle physics were at center stage and General Relativity was a side-player at best. Yet, this odd viewpoint is still enjoyable and interesting. This is also one of the least equation burdened book in this genre.
Unfortunately, General Relativity is not really a perfect theory. We know the theory must be wrong. The theory is non-quantum and stubbornly refuses to quantize. The book was not very thought provoking, as it praised General Relativity instead of delving into its weaknesses. Certainly it is exploring the weaknesses and assumptions of Relativity that will lead to unification.
Often books with lots of science and math don’t do well in audible format. This book is not about the science or math of the theory, but instead describes the personalities and stories surrounding General Relativity. This works very well in audible format and the narration is excellent, slow, clear and even passionate.