![]() Yet by the end of these chapters, each of these ideas is related back to how the Earth was ultimately measured. Along the way, he explains how geology and chemistry became branches of science, the idea of plate tectonics, the discovery of dinosaur fossils and chemical elements, and a bit about thermodynamics. ![]() Bryson introduces a wide array of scientists who had a hand in determining these measurements, and gives helpful and often eccentric background information about each individual. Part Two, Chapters 4-7, is about the size of the Earth and the painstaking lengths scientists have gone to in order to figure out the age and weight of our planet. Finally, he explores how the planets were discovered and how the universe was measured, supernovae, and how these things all relate back to theory of the Big Bang. He also introduces the theory of the Big Bang, and describes the complexities and disputes that inherently go along with it. Here, Bryson starts by talking about the origins, theories, and qualities of the atom. ![]() Part One, consisting of Chapters 1-3, is about the cosmos. ![]() ![]() Throughout the course of an introduction, thirty chapters, and nearly five-hundred pages, Bryson highlights the creation of the Earth, where we are now as a species, and a lot of what has happened in between. ![]()
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