A scientist randomly discovers one of the most important findings of all the time. He shares his finding only with one of his old friends and shorty after that disappear. For a period of time nobody, even the scientist himself knows where he is or if he is kidnaped. After going through a series of events finally he realizes that he is no longer on Earth and is in another universe. In the new universe he finds out that his original universe is a baby universe in a bigger one which he names it the mother universe. In the mother universe, which has completely different physical, chemical and biological properties, he first find several living creatures from Earth and other solar systems in the Milky Way Galaxy, and later finds out about the real inhabitants of the mother universe. He stays in the mother universe for a period of time which is equal to sixteen years on Earth and finally request from the scientists in the mother universe to be returned to his own original home, the Earth. During his stay in the mother universe he finds new friends and learns many new scientific data. He realizes that the whole structure of the mother universe is different than his own original universe. The creatures in the mother universe are much more advanced than him. Since the two universes share space in certain parts and overlap, during his stay in the mother universe, in several occasions he and his new friends visit Earth, but cannot communicate with people on Earth, because they are in two different worlds with different laws of physics. Finally, in spite of extreme weak chance, the original inhabitants in the mother universe facilitate his return to Earth. After safe return to Earth he finds out that he has been considered as a dead person and he should prove his identity.

Presents the current understanding of the nature of time and space, and an approachable explanation of Einstein's theory of special relativity; then goes on to connect these to possible time travel along with the accompanying paradoxes involved.

This book includes numerous calculations for the many specific examples included within. I have included the many calculated examples to provide the reader with immediate justifications for the numerous concepts described. This was not done to belittle or talk down to the reader but rather to give the reader a clear sense of the plausibility for the propulsion methods and performance capabilities thereof. Interstellar travel at the many specific highly relativistic velocities contemplated in this bookand, in some cases, extreme vehicle massesis still a very controversial subject but nonetheless a highly mathematicalized and intelligible subject. My hope and intention is to thus clearly inspire and show the reader the plausibility of the concepts by providing the reader with proper evidence through his or her simple inspection of the formulas and values included in the computations. Some speculative physics is included, which is based on commonly presented theoretical constructs.

A "Fictitious Textbook" in the form of an "Interview with an AI", "Beyond the Limits of Time™: A Practical Guide to Creating & Using a Time Machine" takes readers on a thrilling adventure using practical examples to both guide & instruct them on how to use an AI to build & operate a Time Machine, as well as all the parts & technologies needed each step along the way!

Assuming basic knowledge of special and general relativity, this book guides the reader to problems under consideration in modern research, concerning black holes, wormholes, cosmology, and extra dimensions. Its first part is devoted to local strong field configurations (black holes and wormholes) in general relativity and its most relevant extensions: scalar-tensor, f(R), and multidimensional theories. The second part discusses cosmology, including inflation and problems of a unified description of the whole evolution of the universe. The third part concerns multidimensional theories of gravity and contains a number of original results obtained by the authors. Expository work is conducted for a mechanism of symmetries and fundamental constants formation. The original approach to nonlinear multidimensional gravity that is able to construct a unique perspective describing different phenomena is highlighted.Much of the content was previously presented only in journal publications and is new for book contents, e.g., on regular black holes, various scalar field solutions, wormholes and their stability, inflation, clusters of primordial black holes, and multidimensional gravity. The last two topics are added in this new edition of the book. The other chapters are also updated to include new discoveries like the detection of gravitational waves.

There are various arguments for the metaphysical impossibility of time travel. Is it impossible because objects could then be in two places at once? Or is it impossible because some objects could bring about their own existence? In this book, Nikk Effingham contends that no such argument is sound and that time travel is metaphysically possible. His main focus is on the Grandfather Paradox: the position that time travel is impossible because someone could not go back in time and kill their own grandfather before he met their grandmother. In such a case, Effingham argues that the time traveller would have the ability to do the impossible (so they could kill their grandfather) even though those impossibilities will never come about (so they won't kill their grandfather). He then explores the ramifications of this view, discussing issues in probability and decision theory. The book ends by laying out the dangers of time travel and why, even though no time machines currently exist, we should pay extra special care ensuring that nothing, no matter how small or microscopic, ever travels in time.

NATIONAL BESTSELLER • Inspired by the fantastic worlds of Star Trek, Star Wars, and Back to the Future, the renowned theoretical physicist and national bestselling author of The God Equation takes an informed, serious, and often surprising look at what our current understanding of the universe's physical laws may permit in the near and distant future. Teleportation, time machines, force fields, and interstellar space ships—the stuff of science fiction or potentially attainable future technologies? Entertaining, informative, and imaginative, Physics of the Impossible probes the very limits of human ingenuity and scientific possibility.