Katie Mack’s timely (it’s 2020 after all) survey of the various ways the Universe might end, based on current physics, was a delightful read. It is an interesting and fun book. We learn about the Big Crunch (the Universe shrinking back), the Heat Death, or rather the high-entropy death, the Big Rip, Vacuum decay, or the “quantum bubble of death” if you want to call it that, and the “bounce”. The bounce is a bouncing Universe with repeated Big Bangs. This could result from a much larger eternal ekpyrotic Universe where colliding 3D branes result in repeated Big Bangs. Personally, I am hoping for the quantum bubble of death.
To understand where the various ideas regarding the end of the Universe come from, you need to understand some of the physics and the cosmology. We learn something about CMB, or the Cosmic Microwave Background, Big Bang, cosmic inflation, Planck Time, GUTs, Nucleosynthesis, the standard model, de Sitter Space, black holes, electroweak symmetry breaking, the Higgs Boson and the Higgs field, multiverses, and much more. Perhaps most importantly, we learn about dark matter and dark energy, which are important concepts that have greatly changed cosmology over the last few years. Chapter 2 on the Big Bang reminded me a lot about an old book by Stephen Weinberg, the first 3 minutes. However, Katie Mack puts a modern spin on it and goes much further beyond our Universe. I was intrigued to hear that it might be possible to communicate between different Universes in a multiverse using gravity, or gravity waves.
The book is written for laymen, and I found it to be between Neil De Grasse Tyson / Carl Sagan and Stephen Hawking in difficulty level. The book covers a lot of concepts and theories but does so concisely, simply and not in a mathematical way. Not so simply though that it is misleading. I am an Engineer with an undergrad degree in physics so I may not be the best person to judge whether this is an easy read for laymen, but I believe it is. I am very interested in these kinds of topics, and I read all popularized books on cosmology, modern physics, the standard model, that I can find. This was one of the most fun books that I’ve ever read.
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About the author
All good things must come to an end
I am an avid reader of astronomy/cosmology/astrophysics books & like content. They mostly all have one thing in common; they all talk about the big bang and how the universe started. It does get redundant after a time to read about the start of the cosmos over and over. This book was a great change of pace. Not only was it looking at the many ways we could all eat the big one, but it did so in a very humorous way. Dr. Katie Mack does a great job of explaining each "end" requiring the reader to have little or no formal background on the topic to understand it. She also adds in commentary foot notes that are humorous & feel like she is just having a conversation with you rather than talking at you. (see photos for examples)Anyone who has an interest in physics, astronomy, or just space in general should give this book a read.
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