Gen-Xer, software engineer, and lifelong avid reader. Soft spots for sci-fi, fantasy, and history, but I'll read anything good.
I enjoyed this book. Robert Hazen starts from the beginning and describes how the Earth formed from starstuff, its crust and minerals crystallizing from cooling magma. He covers the planet’s storied relationship with its moon, the importance of tectonic plates, the formation of the seas, and the magnetosphere. We learn about the chemistry that provided a basis for proto-life-as-we-know-it, and, eventually, the real deal. We learn about the complex feedback loops that govern the climate system, the revelation that the entire planet may have once been covered in ice.
Hazen emphasizes the interdependence of the planet’s features and life itself: “geology influences life and life influences life”. Eons of metabolizing, respiring, and dying plants and animals have unquestionable altered the features and chemical makeup of the Earth’s surface, and, more importantly, the climate. Hazen also takes some time to identify instances of past natural climate change, triggered by imperfections in the Earth’s rotation, changes in the sun, volcanic activity, feedback loops caused by clouds/ocean/ice, and the emissions of the biosphere. Deniers of man-made climate change often refer to such events (usually with limited understanding of what caused them) to minimize the idea that human activity makes any difference, but Hazen points to the past as evidence that the equilibrium is delicate and *can* be changed, sometimes with catastrophic consequences for the ecosystem.
Finally, I’ve often wondered how scientists *know* about things that happened millions or billions of years ago -- I mean, I was aware that they had methods, but I couldn’t have explained them in much depth. Well, this book provides some good answers.
A worthwhile read. Informative and sweeping without being too dense.
While no one can replace Carl Sagan, Tyson might be the nearest thing the 2010s have to him, a friendly advocate of the sciences who knows how to explain abstract topics in everyday language without dumbing them down or dissipating their inherent wonder. I enjoyed his series on NOVA, so I decided to pick up this book after I noticed it on sale at audible.
No regrets. If you want an introduction or a refresher course on the basics of astronomy and astrophysics, this series of essays on various topics should fill in the gaps nicely. Tyson covers topics such as the mechanics of the solar system, the formation of the Earth and planets, the Big Bang and the origins of the universe, and the essential concepts of 20th century physics (quantum theory, relativity, subatomic particles, forces, string theory). Much of the ground Tyson treads will be familiar to those who watched Dr. Sagan's classic Cosmos series in the early 1980s, but a lot of discoveries have been made since then, so the update is worthwhile. Like Sagan, Tyson makes no bones about the fact that he sees science, not religion/superstition/mysticism, as the only reliable tool for understanding how the universe actually works. As he points out, no religious text has yet proved useful for predicting physical phenomena -- in fact, The Bible significantly misstates the value of Pi. (However, he's much less obnoxious about it than Dawkins.)
Tyson also spends some time nitpicking on the scientific errors in several Hollywood blockbusters. Yes, he's that guy -- the one that you stopped inviting to Doctor Who night.
If I have a complaint about this book, it's that its provenance as a collection of articles is pretty obvious. Things that were stated as assumptions or background information in one chapter will be repeated again a few chapters later. The editor could have done a better job integrating everything. And it's probably not a book I'd recommend to more knowledgeable readers; most of the information here, though presented in an appealing, accessible way, is basic.