From the author of Einstein’s Riddle comes a collection of ingenious puzzles that will stimulate your brain while also introducing you to science’s most intriguing concepts, paradoxes, and unsolved conundrums. How can a cat be both dead and alive? Can you travel back in time to kill your own grandfather? How can a particle also be a wave? And where are the aliens? After guiding readers through warm-up logic puzzles designed to sharpen the wits, Jeremy Stangroom tackles time dilation, wave-particle duality, time travel, and quantum entanglement, along with many other scientific phenomena. Engaging your critical thinking skills while at the same time challenging your sense of reality, Einstein’s Twin is a must-have for any avid puzzler’s library.

Understanding Einstein’s Creative Genius Not since Isaac Newton had anyone conceived the universe in such a revolutionary, startling new way. Given the fervent renewed appreciation for the contributions Albert Einstein has bestowed on humanity, physicist and popular science writer Barry Parker dedicates a book to explaining in the clearest possible terms to the broadest possible audience the meaning and beauty of Einstein’s theories. While tracing the story of Einstein’s life, Parker seizes on the crucial groundbreaking theories that Einstein envisioned. Through Parker's eloquence, eye for detail, and clever use of Einsteinian cartoons and vivid illustrations, he enables the reader to see and appreciate for perhaps the first time the full meaning and scope of Einstein’s Special Theory of Relativity and General Theory of Relativity. Parker then guides the reader to the next step in Einstein's revelations: the possibility of time travel. Parker’s incomparable gift for language captures Einstein’s uniqueness, singular brilliance, and stunning theories. The clarity of the writing coupled with the many illustrations will drive home the point why so many consider Einstein to be the greatest scientist who ever lived and Time magazine named Albert Einstein “Person of the Century.” BARRY PARKER (Pocatello, ID) is an award-winning science writer and the author of 27 highly acclaimed popular science books. He is professor emeritus of physics at Idaho State University.

"A fresh and highly visual tour through Einstein's astonishing legacy." —Brian Greene There's no better short book that explains just what Einstein did than Einstein's Cosmos. Keying Einstein's crucial discoveries to the simple mental images that inspired them, Michio Kaku finds a revealing new way to discuss his ideas, and delivers an appealing and always accessible introduction to Einstein's work.

Explore the gray areas in your gray matter with philosophical brainteasers from armchair philosopher and bestselling author of The Pig That Wants to Be Eaten, Julian Baggini. Is your brain ready for a thorough philosophical health check? Julian Baggini, the author of the international bestseller The Pig That Wants to Be Eaten, and his fellow founding editor of The Philosopher's Magazine Jeremy Stangroom have some thought-provoking questions about your thinking: Is what you believe coherent and consistent, or a jumble of contradictions? If you could design a God, what would He, She, or It be like? And how will you fare on the tricky terrain of ethics when your taboos are under the spotlight? Do You Think What You Think You Think features a dozen philosophical quizzes guaranteed to make armchair philosophers uncomfortably shift in their seats. Fun, challenging, and surprising, this book will enable you to discover the you you never knew you were.

The purposes of this book are (1) to explore and expound relativity physics and four-dimensional symmetry from the logically simplest viewpoint by making one single postulate instead of two; and (2) to indicate the simplest generalization of the Lorentz transformation in order to cope with frames with constant linear accelerations. The fundamentally new ideas of the first purpose are developed on the basis of the term paper of a Harvard physics undergraduate. They lead to an unexpected affirmative answer to the long-standing question of whether it is possible to construct a relativity theory without postulating the constancy of the speed of light and retaining only the first postulate of special relativity. This question was discussed in the early years following the discovery of special relativity by many physicists, including Ritz, Tolman, Kunz, Comstock and Pauli, all of whom obtained negative answers. Furthermore, the new theory of relativity indicates the truly universal and fundamental constants in physics, and provides a broad view of relativistic physics beyond special relativity. It substantiates the view and sheds light on the understanding that the four-dimensional symmetry framework can accommodate many different concepts of physical time, including common time and Reichenbach's general concept of time. This logically simplest viewpoint of relativity allows a natural extension of the physics of particles and fields from inertial frames to noninertial frames in which the speed of light is not constant. New predictions in physics resulting from this new viewpoint are discussed. The book is based on papers by the author and his collaborators in Physics Letters A, Nuovo Cimento B, and Physical Review A and D.

“A thought-provoking critique of Einstein’s tantalizing combination of brilliance and blunder.”—Andrew Robinson, New Scientist Never before translated into English, the Manimekhalai is one of the great classics of Indian culture.

This richly illustrated book is unique in bringing Einstein's relativity to a higher level for the non-specialist than has ever been attempted before, using nothing more than grade-school algebra. Bondi's approach with spacetime diagrams is simplified and expanded, clarifying the famous asymmetric aging-of-twins paradox. Einstein's theory of gravity, general relativity, is simplified for the reader using spacetime diagrams. The theory is applied to important topics in physics such as gravitational waves, gravitational collapse and black holes, time machines, the relationship to the quantum world, galactic motions and cosmology.