Book excerpt: What will the Earth look like if severe climate change happens, and humans survive? What will the Earth look like if severe climate change happens, and humans survive? It is not an easy question to contemplate, let alone answer. If severe climate change happens, the Earth will continue to warm for centuries after we've exhausted our fossil fuels. Civilization will shatter, the great artworks and monuments vanishing as cities fall into rubble and coasts disappear beneath rising seas. There will be a mass extinction, coral reefs and ice sheets will disappear, and the survivors will migrate to new homes and habitats for generations as the climate continually changes. Only after hundreds of thousands of years will the climate to return to what we currently consider as normal. Right now, this is our most likely future. Scary as it sounds at first, it is a future that is very much worth exploring. It's crazy, then horrible, then tough, and then increasingly strange. This clear-eyed overview weaves together the latest scientific research on climate change, mass extinction, collapse, and evolution, to describe a deep future that is ever-changing but very knowable. Want to explore it? This is your sourcebook.