Some books that you read make you question everything. Alan Weisman's The World Without Us is definitely one of those books. The book seeks to answer the question 'What would happen to the world if humans were to disappear?' I've read books that look at it from the flip side of the coin where humans have destroyed the planet to such a degree that humanity can no longer be sustained. It was interesting to look at the reverse. Weisman looked at the issue from a variety of viewpoints. He looked at the evolution of humans and their impact on the megafauna and megaflora of the planet. His point there was that although much of the animals and plants were eradicated by us, variations of these have survived into present day. Therefore, if humanity were to disappear nature would find a way to carry on and maybe another kind of humanity would take our place. He also looked at the damage we have done through chemical processes (I'm talking nuclear) and whether or not the planet's remaining inhabitants could survive. He went to a variety of places where it was as close to being primeval as possible (Kingman Reef) and also those places which were irrevocably changed by us (Chernobyl). He spoke to scientists of all disciplines (many of which sound like amazing careers that I need to look into immediately). It was a thoroughly researched and thought provoking read and I encourage anyone interested in conservancy and ecology to go and give this book a shot.