Commander Colin Maclntyre, it began as a routine training flight over the Moon. For Dahak, a self-aware Imperial battleship, it began millennia ago when that powerful artificial intelligence underwent a mutiny in the face of the enemy. The mutiny was never resolved--Dahak was forced to maroon not just the mutineers but the entire crew on prehistoric Earth. Dahak has been helplessly waiting as the descendants of the loyal crew regressed while the mutineers maintained control of technology that kept them alive as the millennia passed. But now Dahak's sensors indicate that the enemy that devastated the Imperium so long ago has returned--and Earth is in their path. For the sake of the planet, Dahak must mobilize its defenses. And that it cannot do until the mutineers are put down. So Dahak has picked Colin Maclntyre to be its new captain. Now Maclntyre must mobilize humanity to destroy the mutineers once and for all--or Earth will become a cinder in the path of galactic conquest.

    Dick is the magnificent and imaginative final work of an author who dedicated his life to questioning the nature of reality and perception, the malleability of space and time, and the relationship between the human and the divine. Edited and introduced by Pamela Jackson and Jonathan Lethem, this will be the definitive presentation of Dick’s brilliant, and epic, final work. In The Exegesis, Dick documents his eight-year attempt to fathom what he called "2-3-74," a postmodern visionary experience of the entire universe "transformed into information." In entries that sometimes ran to hundreds of pages, Dick tried to write his way into the heart of a cosmic mystery that tested his powers of imagination and invention to the limit, adding to, revising, and discarding theory after theory, mixing in dreams and visionary experiences as they occurred, and pulling it all together in three late novels known as the VALIS trilogy. In this abridgment, Jackson and Lethem serve as guides, taking the reader through the Exegesis and establishing connections with moments in Dick’s life and work.

    Our Big Bang, our distant future, parallel worlds, the sub-atomic and intergalactic - none of them are what they seem. But there is a way to understand this immense strangeness - mathematics. Seeking an answer to the fundamental puzzle of why our universe seems so mathematical, Tegmark proposes a radical idea: that our physical world not only is described by mathematics, but that it is mathematics. This may offer answers to our deepest questions: How large is reality? What is everything made of? Why is our universe the way it is?Table of ContentsPreface 1 What Is Reality? Not What It Seems • What’s the Ultimate Question? • The Journey Begins Part One: Zooming Out 2 Our Place in Space Cosmic Questions • How Big Is Space? • The Size of Earth • Distance to the Moon • Distance to the Sun and the Planets • Distance to the Stars • Distance to the Galaxies • What Is Space? 3 Our Place in TimeWhere Did Our Solar System Come From? • Where Did theGalaxies Come From? • Where Did the Mysterious MicrowavesCome From? • Where Did the Atoms Come From? 4 Our Universe by NumbersWanted: Precision Cosmology • Precision Microwave-Background Fluctuations • Precision Galaxy Clustering • The Ultimate Map of Our Universe • Where Did Our Big Bang Come From? 5 Our Cosmic Origins What’s Wrong with Our Big Bang? • How Inflation Works • The Gift That Keeps on Giving • Eternal Inflation 6 Welcome to the Multiverse The Level I Multiverse • The Level II Multiverse • Multiverse Halftime Roundup Part Two: Zooming In 7 Cosmic Legos Atomic Legos • Nuclear Legos • Particle-Physics Legos • Mathematical Legos • Photon Legos • Above the Law? • Quanta and Rainbows • Making Waves • Quantum Weirdness • The Collapse of Consensus • The Weirdness Can’t Be Confined • Quantum Confusion 8 The Level III Multiverse The Level III Multiverse • The Illusion of Randomness • Quantum Censorship • The Joys of Getting Scooped • Why Your Brain Isn’t a Quantum Computer • Subject, Object and Environment • Quantum Suicide • Quantum Immortality? • Multiverses Unified • Shifting Views: Many Worlds or Many Words? Part Three: Stepping Back 9 Internal Reality, External Reality and Consensus Reality External Reality and Internal Reality • The Truth, the Whole Truth and Nothing but the Truth • Consensus Reality • Physics: Linking External to Consensus Reality 10 Physical Reality and Mathematical Reality Math, Math Everywhere! • The Mathematical Universe Hypothesis • What Is a Mathematical Structure? 11 Is Time an Illusion? How Can Physical Reality Be Mathematical? • What Are You? • Where Are You? (And What Do You Perceive?) • When Are You? 12 The Level IV Multiverse Why I Believe in the Level IV Multiverse • Exploring the Level IV Multiverse: What’s Out There? • Implications of the Level IV Multiverse • Are We Living in a Simulation? • Relation Between the MUH, the Level IV Multiverse and Other Hypotheses •Testing the Level IV Multiverse 13 Life, Our Universe and Everything How Big Is Our Physical Reality? • The Future of Physics • The Future of Our Universe—How Will It End? • The Future of Life •The Future of You—Are You Insignificant? Acknowledgments Suggestions for Further Reading Index

    But are there limits to what we can discover about our physical universe?In this very personal journey to the edges of knowledge, Marcus du Sautoy investigates how leading experts in fields from quantum physics and cosmology, to sensory perception and neuroscience, have articulated the current lie of the land. In doing so, he travels to the very boundaries of understanding, questioning contradictory stories and consulting cutting edge data.Is it possible that we will one day know everything? Or are there fields of research that will always lie beyond the bounds of human comprehension? And if so, how do we cope with living in a universe where there are things that will forever transcend our understanding?In What We Cannot Know, Marcus du Sautoy leads us on a thought-provoking expedition to the furthest reaches of modern science. Prepare to be taken to the edge of knowledge to find out if there’s anything we truly cannot know.

    Heinlein is a collection of science fiction short stories by Robert A. Heinlein published in 1966.It includes an introduction entitled "Pandora's Box" that describes some of the difficulties in making predictions about the near future. Heinlein outlines some of his predictions that he made in 1949 (published 1952) and examines how well they stood up to some 15 years of progress in 1965. The prediction was originally published in Galaxy magazine, Feb 1952, Vol. 3, No. 5, under the title "Where to?" (pp. 13-22).Following the introduction are five short stories: * "Free Men" (written c. 1947, but first published in this collection, 1966) * "Blowups Happen" (1940) * "Searchlight" (1962) * "Life-Line" (1939) * "Solution Unsatisfactory" (1940)In 1980, the entire contents of this collection, including "Pandora's Box" (further updated), were engulfed in Heinlein's collection, Expanded Universe.

    on an Earth which, like an abandon playground, has long ago been left behind by an evolving humanity... human-scale action within a vast canvas."-- The Excyclopedia of Science Fiction.Encompassing time-travel, powerful mystery and the future history of humanity to its last handful of survivors, Across Realtime spans millions of years and is an utterly engrossing SF classic."You can hardly turn the pages fast enough. As sheer entertainment, it's a winner"-- Locus

    His first was that nothing can travel faster than light-the ultimate speed limit. This simple fact leads to the unavoidable conclusion that space and time must be linked together forever as Spacetime. With his second monumental insight, Einstein showed how Spacetime is warped and stretched by the gravity of all objects in the Universe and even punctured by black holes. But such possible twisting of Spacetime allowed a magic not even Einstein could have imagined: time-travel.Theoretical physicist Jim Al-Khalili finally lays science fiction to rest as he opens up Einstein's Universe. Leading us gently and light-heartedly through the dizzying world of our space and time, he even gives us the recipe for a time machine, capable of taking us Back to the Future, to Alice's Wonderland, or on a trip with the Terminator.

    Since the ringed planet carries no life, scientists deduce the mysterious ship to be a visitor from another star.The world's frantic efforts to signal the aliens go unanswered. The first contact is hostile: the invaders blast a Soviet space station, seize the survivors, and then destroy every dam and installation on Earth with a hail of asteriods. Now the conquerors are descending on the American heartland, demanding servile surrender--or death for all humans.

    On an island with a glass shore - relic of some even more ancient conflict - she discovers she is to be hunted by the Huhsz, a religious cult which believes she is the last obstacle before their faith's apotheosis. She has to run, knowing her only hope of finally escaping the Huhsz is to find the last of the ancient, apocalyptically powerful but seemingly cursed Lazy Guns. But that is just the first as well as the final step on a search that takes her on an odyssey through the exotic Golterian system and results in both a trail of destruction and a journey into her own past, as well as that of her family and the system itself; a journey that changes everything.

    His only chance for survival is locked within a band of mining robots who are dutifully searching the surface for a mysterious object known as the Key to Perihelion. His name is Derec. His journey will take him to a city different from any he has ever known. A fantastic metropolis beyond his dreams: Robot City.

    Clearly, geeks know something about life in the 21st century that other folks don’t—something we all can learn from. Geek Wisdom takes as gospel some 200 of the most powerful and oft-cited quotes from movies (“Where we’re going, we don’t need roads”), television (“Now we know—and knowing is half the battle”), literature (“All that is gold does not glitter”), games, science, the Internet, and more. Now these beloved pearls of modern-day culture have been painstakingly interpreted by a diverse team of hardcore nerds with their imaginations turned up to 11. Yes, this collection of mini-essays is by, for, and about geeks—but it’s just so surprisingly profound, the rest of us would have to be dorks not to read it. So say we all.

    This authoritative yet accessible study is the ultimate astronomy lesson. Combining fascinating and often alarming scenarios that seem plucked from science fiction with the latest research and opinions, Plait illustrates why outer space is not as remote as most people think. Each chapter explores a different phenomenon, explaining it in easy-to-understand terms, and considering how life on earth and the planet itself would be affected should the event come to pass. Rather than sensationalizing the information, Plait analyzes the probability of these catastrophes occurring in our lifetimes and what we can do to stop them. With its entertaining tone and enlightening explanation of unfathomable concepts, Death from the Skies! will appeal to science buffs and beginners alike.

    In this amazingly comprehensible history of the universe, Simon Singh decodes the mystery behind the Big Bang theory, lading us through the development of one of the most extraordinary, important, and awe-inspiring theories in science.

    The inner dimensions are at odds with the outer; there are different chambers to be breached, some containing deserted cities; and the furthest chamber contains the greatest mystery ever to confront the Stone's scientists.EternityHere, from the other side of time, come: THISTLEDOWN, the asteroid starship of a future that is not quite our future; GAIA, a parallel reality where Alexander the Great's empire has ruled for two thousand years; and THE WAY, an infinite corridor through space-time which traverses and encompasses whole universes. And as the strands of these mysteries are unravelled, so the ordering and the end of mankind -- and our entire Universe -- come into question.

    This is an exploration of her relationship with the literary form we have come to know as "science fiction,” a relationship that has been lifelong, stretching from her days as a child reader in the 1940s, through her time as a graduate student at Harvard, where she worked on the Victorian ancestor of the form, and continuing as a writer and reviewer.  This book brings together her three heretofore unpublished Ellmann Lectures from 2010: "Flying Rabbits," which begins with Atwood's early  rabbit superhero creations, and goes on to speculate about masks, capes, weakling alter egos, and Things with Wings; "Burning Bushes," which follows her into Victorian otherlands and beyond; and "Dire Cartographies," which investigates Utopias and Dystopias.  In Other Worlds also includes some of Atwood's key reviews and thoughts about the form. Among those writers discussed are Marge Piercy, Rider Haggard, Ursula Le Guin, Ishiguro, Bryher, Huxley, and Jonathan Swift. She elucidates the differences (as she sees them) between "science fiction" proper, and "speculative fiction," as well as between "sword and sorcery/fantasy" and "slipstream fiction." For all readers who have loved The Handmaid's Tale, Oryx and Crake, and The Year of the Flood, In Other Worlds is a must.  From the Hardcover edition.