An organism harmless on earth where it is subject to gravity terrorizes a research station in space. Scientists die violently and from their insides spill creatures that are part human, part frog and part mouse.

Renowned relativist James Hartle's fluent and accessible physics-first introduction to general relativity uses minimal new mathematics and begins with the essential physical applications. This ground-breaking text, reissued by Cambridge University Press, makes this fundamental theory accessible to virtually all physics majors.

"Of the four fundamental forces of nature, gravity might be the least understood and yet the one with which we are most intimate. From the months each of us spent suspended in the womb anticipating birth to the moments when we wait for sleep to transport us to other realities, we are always aware of gravity. In On Gravity, physicist A. Zee combines profound depth with incisive accessibility to take us on an original and compelling tour of Einstein's general theory of relativity. Inspired by Einstein's audacious suggestion that spacetime could ripple, Zee begins with the stunning discovery of gravity waves. He goes on to explain how gravity can be understood in comparison to other classical field theories, presents the idea of curved spacetime and the action principle, and explores cutting-edge topics, including black holes and Hawking radiation. Zee travels as far as the theory reaches, leaving us with tantalizing hints of the utterly unknown, from the intransigence of quantum gravity to the mysteries of dark matter and energy. Concise and precise, and infused with Zee's signature warmth and freshness of style, On Gravity opens a unique pathway to comprehending relativity and gaining deep insight into gravity, spacetime, and the workings of the universe"--Publisher's website.

Self-contained and comprehensive, this definitive new edition provides a complete overview of the intersection of gravity, supergravity, and superstrings.

Revised, expanded new edition of the weird science classic-a compilation of material on Anti-Gravity, Free Energy, Flying Saucer Propulsion, UFOs, Suppressed Technology, NASA Cover-ups and more. Includes: - Photos of Area 51 in Nevada - How to build a flying saucer - Arthur C. Clarke on anti-gravity - Crystals and their role in levitation - Secret government research and development - Nikola Tesla on how anti-gravity airships could draw power from the atmosphere - Bruce Cathie's Anti-Gravity Equation - NASA, the Moon and Anti-Gravity - The mysterious technology used by the ancient Hindus of the Rama Empire - The Rand Corporation's 1956 study on Gravity Control - T. Townsend Brown's electro-gravity experiments - How equations exist for electro-gravity and magneto-gravity - Schematics, photos and illustrations with patents, technical illustrations, photos, & cartoons

This book reviews the principle and rationale for using artificial gravity during space missions, and describes the current options proposed, including a short-radius centrifuge contained within a spacecraft. Experts provide recommendations on the research needed to assess whether or not short-radius centrifuge workouts can help limit deconditioning of physiological systems. Many detailed illustrations are included.