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Why is the future so different from the past? Why does the past affect the future and not the other way around? What does quantum mechanics really tell us about the world? In this important and accessible book, Huw Price throws fascinating new light on some of the great mysteries of modern physics, and connects them in a wholly original way. Price begins with the mystery of the arrow of time. Why, for example, does disorder always increase, as required by the second law of thermodynamics? Price shows that, for over a century, most physicists have thought about these problems the wrong way. Misled by the human perspective from within time, which distorts and exaggerates the differences between past and future, they have fallen victim to what Price calls the "double standard fallacy": proposed explanations of the difference between the past and the future turn out to rely on a difference which has been slipped in at the beginning, when the physicists themselves treat the past and future in different ways. To avoid this fallacy, Price argues, we need to overcome our natural tendency to think about the past and the future differently. We need to imagine a point outside time -- an Archimedean "view from nowhen" -- from which to observe time in an unbiased way. Offering a lively criticism of many major modern physicists, including Richard Feynman and Stephen Hawking, Price shows that this fallacy remains common in physics today -- for example, when contemporary cosmologists theorize about the eventual fate of the universe. The "big bang" theory normally assumes that the beginning and end of the universe will be very different. But if we are to avoid the double standard fallacy, we need to consider time symmetrically, and take seriously the possibility that the arrow of time may reverse when the universe recollapses into a "big crunch." Price then turns to the greatest mystery of modern physics, the meaning of quantum theory. He argues that in missing the Archimedean viewpoint, modern physics has missed a radical and attractive solution to many of the apparent paradoxes of quantum physics. Many consequences of quantum theory appear counterintuitive, such as Schrodinger's Cat, whose condition seems undetermined until observed, and Bell's Theorem, which suggests a spooky "nonlocality," where events happening simultaneously in different places seem to affect each other directly. Price shows that these paradoxes can be avoided by allowing that at the quantum level the future does, indeed, affect the past. This demystifies nonlocality, and supports Einstein's unpopular intuition that quantum theory describes an objective world, existing independently of human observers: the Cat is alive or dead, even when nobody looks. So interpreted, Price argues, quantum mechanics is simply the kind of theory we ought to have expected in microphysics -- from the symmetric standpoint. Time's Arrow and Archimedes' Point presents an innovative and controversial view of time and contemporary physics. In this exciting book, Price urges physicists, philosophers, and anyone who has ever pondered the mysteries of time to look at the world from the fresh perspective of Archimedes' Point and gain a deeper understanding of ourselves, the universe around us, and our own place in time.
This volume explores Western views on time from ancient Greece through the Middle Ages, going on to modern scientific concepts, including relativity, biological time, cosmic time, and whether there is a beginning (or an end) to time. Starting with ancient cyclical theories of time, the author moves on to more modern topics such as the theory of linear time, the notion that velocity is a function of time (introduced by Galileo), Newton's mathematical explanations of time, the laws of thermodynamics in relation to time, and the theory of relativity.
While experience tells us that time flows from the past to the present and into the future, a number of philosophical and physical objections exist to this commonsense view of dynamic time. In an attempt to make sense of this conundrum, philosophers and physicists are forced to confront fascinating questions, such as: Can effects precede causes? Can one travel in time? Can the expansion of the Universe or the process of measurement in quantum mechanics define a direction in time? In this book, researchers from both physics and philosophy attempt to answer these issues in an interesting, yet rigorous way. This fascinating book will be of interest to physicists and philosophers of science and educated general readers interested in the direction of time.
Examines scientific theories pertaining to the measurement of earth's history.
An introduction to the arrow of time and a new, related, theory of quantum measurement.
In an alien universe where space and time play by different rules, interstellar voyages last longer for the travellers than for those they left behind. After six generations in flight, the inhabitants of the mountain-sized spacecraft the Peerless have used their borrowed time to develop advanced technology that could save their home world from annihilation. But not every traveller feels allegiance to a world they have never seen, and as tensions mount over the risks of turning the ship around and starting the long voyage home, a new complication arises: the prospect of constructing a messaging system that will give the Peerless news of its own future. While some of the crew welcome the opportunity to be warned of impending dangers - and perhaps even hear reports of the ship's triumphant return - others are convinced that knowing what lies ahead will be oppressive, and that the system will be abused. Agata longs for a chance to hear a message from the ancestors back on the home world, proving that the sacrifices of the travellers have not been in vain, but her most outspoken rival, Ramiro, fears that the system will undermine every decision the travellers make. When a vote fails to settle the matter and dissent erupts into violence, Ramiro, Agata and their allies must seek a new way to bring peace to the Peerless - by traveling to a world where time runs in reverse. THE ARROWS OF TIME is the final volume of the Orthogonal trilogy, bringing a powerful and surprising conclusion to the epic story of the Peerless that began with THE CLOCKWORK ROCKET and THE ETERNAL FLAME.
Dance prodigy Karma Clark's unrequited love for Danny is unbearable until Aaryn, son of Cupid, returns to try to fix his mistake and ends up falling in love with Karma, now a teenage mother.
"A comprehensive look at WMD's antecedents, from flamethrowers of the Peloponnesian War to plague-bearing booby traps.... Rich and entertaining." -Newsweek Featuring a new introduction by the author. Flamethrowers, poison gases, incendiary bombs, the large-scale spreading of disease... are these terrifying agents and implements of warfare modern inventions? Not by a long shot. Weapons of biological and chemical warfare have been in use for thousands of years, and Greek Fire, Poison Arrows & Scorpion Bombs, Adrienne Mayor's fascinating exploration of the origins of biological and unethical warfare draws extraordinary connections between the mythical worlds of Hercules and the Trojan War, the accounts of Herodotus and Thucydides, and modern methods of war and terrorism. Greek Fire, Poison Arrows & Scorpion Bombs will catapult readers into the dark and fascinating realm of ancient war and mythic treachery-and their devastating consequences.
"An accessible and engaging exploration of the mysteries of time." -Brian Greene, author of The Elegant Universe Twenty years ago, Stephen Hawking tried to explain time by understanding the Big Bang. Now, Sean Carroll says we need to be more ambitious. One of the leading theoretical physicists of his generation, Carroll delivers a dazzling and paradigm-shifting theory of time's arrow that embraces subjects from entropy to quantum mechanics to time travel to information theory and the meaning of life. From Eternity to Here is no less than the next step toward understanding how we came to exist, and a fantastically approachable read that will appeal to a broad audience of armchair physicists, and anyone who ponders the nature of our world.
SUNDAY TIMES TOP TEN BESTSELLER DAILY MAIL BOOK OF THE WEEK THE FIRST OFFICIAL HISTORY OF THE RED ARROWS 'Heart-pounding, exhilarating . . . A fascinating testimony of jeopardy, cool heads and the sheer exultant addiction of flying.' SINCLAIR MCKAY 'Fantastic . . . It was wonderful to read about so many old chums and truly legendary aviators. Highly recommended.' JOHN NICHOL (Twitter) 'An exhilarating read! The next-best thing to taking the controls of a Hawk fast-jet. And you're much less likely to throw up.' BEN MILLER 'Inspirational . . . Precision, style and dedication. The Red Arrows are the ultimate in teamwork.' TIM PEAKE 'Perfectly enjoyable . . . As the Red Arrows head towards their 60th anniversary, it's clear the team's place in our hearts is secure.' DAILY MAIL 'A wild ride . . . The ultimate insider guide, relating with great enthusiasm and insight what it means to be inside the cockpit as you scream through the skies at 350 to 450 miles per hour, within what feels like touching distance of your wingman, making continual nanosecond decisions that will result in certain death if you get them wrong.' TELEGRAPH, Patrick Bishop _________________________________________ "Occasionally, you and the team come within read of perfection, up there in the rarefied air of the skies. You never know when those moments will come, but it's what you yearn for as a pilot." The Red Arrows represent the very best speed, agility and precision aerobatic flying in the Royal Air Force, and the people who wear those iconic red flight suits are rigorously selected not just for their flying skills, lightning-fast reflexes and nerves of steel, but for their mental resilience, courage and humility. Written by the Officer Commanding and former Red 1 Team Leader, Wing Commander David Montenegro, and full of never-before-shared tales from pilots past and present, this thrilling history is both a faithful record and a fascinating account of not only what it takes, but what it means, to be a Red Arrow. _________________________________________ Praise for the Red Arrows: 'A lifetime's ambition . . . I still can't believe I've been in a fighter jet. It was fantastic - just to feel the G-force was spectacular.' LEWIS HAMILTON 'So tight, crisp and professional' CHRIS HADFIELD 'I can never quite believe that anyone can fly and aircraft with such precision' PROF. BRIAN COX 'The skill level they have is just off the scale. The Red Arrows is an amazing display of quality' DAVID COULTHARD