Revolutionary scientists joe kirschvink and peter ward unravel the true story of life on earth, from our beginnings on mars to our eventual extinction. An estimated 4. 6 billion years ago, the earth and moon were formed in a violent impact. On this, many agree and even more that a long time after that, life began. However, few know that the first life on the earth may not have emerged on this planet but could, in fact, have begun on mars, brought here by meteorites. In this revolutionary book, leading scientists peter ward and joe kirschvink rewrite the principal account of the history of life on earth. They show not only how the rise of animals was delayed for billions of years but also what it was that first forced fish out of the sea and onto the land. Together, the two scientists explain how developments in the environment led to multiple ice ages before the emergence of dinosaurs and other giant animals and what the true cause of these great beasts eventual extinction was. Finally, charting the course of our own evolution, they explore whether this generation will see the end of the human species. A new history of life proves not only that much of what we think we know should be unlearned but also that the true history of life on earth is much more surprising and wonderful than we could ever have imagined.