A novel of time-traveling adventure from the author of the story “Supertoys Last All Summer Long,” the basis for the movie A.I.: Artificial Intelligence. Winner of two Hugo Awards, one Nebula Award, and named a Grand Master by the Science Fiction Writers of America, Brian W. Aldiss challenged readers’ minds for over fifty years with literate, thought-provoking, and inventive science fiction. In the year 2093, human consciousness has expanded to the point that man can now travel to the past using a technique called “mind-traveling.” Artist Edward Bush returns from a nearly three-year mind-travel to find that his government has crumbled and society is now under the leadership a new regime. Given Bush’s experience, he is recruited by the regime to track down and assassinate a scientist whose ideas threaten to topple everything they've built. This ebook includes an introduction by the author.

'The human consciousness had now widened so alarmingly, was so busy transforming everything on Earth into its own peculiar tones, that no art could exist that did not take proper cognisance of the fact. Something entirely new had to be forged.' The time traveller Bush's adventure takes him through 1930, 1851, the Jurassic and 2093, on the way exploring a modern crisis that remains our own. In Brian Aldiss's tale of time travel, the fiction is once again as psychologically imaginative as it is scientific, an idiosyncrasy of Aldiss's future visions that, over time, have proven remarkably prescient.

Evolution of the Earth reveals the logical framework of geology, shows relations of the science to the totality of human knowledge, and gives some idea of what it is to be a participant in the discipline. In keeping with the preference for a "How do we know?" rather than "What do we know?" approach, the authors stress what assumptions are made by earth historians, what kinds of evidence (and tools for gathering that evidence), and what processes of reasoning and limitations of hypotheses are involved in reconstructing and interpreting the past. Each chapter begins with a list of highlights entitled "Major Concepts". Many chapters have a summary timeline that puts the entire sequence of events into a quick visual reference frame. The use of dioramas and reconstructions of extinct animals and plants has been greatly expanded, so that students can get a more vivid concept of typical life in any part of the geologic past. In many places, the authors have supplied a full page of color photos of classic fossils from each period to improve the visual recognition of the organisms that give life its distinctive history. The areas of hottest controversy, such as mass extinctions, dinosaur endothermy, the origin of life, and controversies over late Proterozoic tectonics and glaciation, have been given separate sections so that students can appreciate the different sides of the debates.