The circumstances that will shape the long-term future of our planet will be constrained by what is physically possible and what is not. This book provides a quantitative view of our civilization over the next 100,000 years, in comparison to the 40-60,000 years it took for modern humans to emerge from Africa, on the basis of contemporary scientific and technological knowledge. The first 5 chapters provide the general scientific background, starting with a brief history of our planet, from its formation 4.5 billion years ago until the present day. The evolution of the Earth's atmosphere and...