This recreational math book takes the reader on a fantastic voyage into the world of natural numbers. From the earliest discoveries of the ancient Greeks to various fundamental characteristics of the natural number sequence, Clawson explains fascinating mathematical mysteries in clear and easy prose. He delves into the heart of number theory to see and understand the exquisite relationships among natural numbers, and ends by exploring the ultimate mystery of mathematics: the Riemann hypothesis, which says that through a point in a plane, no line can be drawn parallel to a given line.While a professional mathematician's treatment of number theory involves the most sophisticated analytical tools, its basic ideas are surprisingly easy to comprehend. By concentrating on the meaning behind various equations and proofs and avoiding technical refinements, Mathematical Mysteries lets the common reader catch a glimpse of this wonderful and exotic world.

    He spent two years gathering information that demonstrates this and along the way interviewed more than a hundred experts in a number of different fields. Among them were parapsychologists, medical doctors, psychologists, psychiatrists, quantum physicists, and researchers into the true nature of reality. Specific examples are presented that indicate what happens when we die, for example that memories can be formed and retained despite a subject’s brain having been shutdown and the blood drained from it. Questions such as whether or not you will be able to communicate with living loved ones after death are addressed, if it is possible to be reborn, and what might be missing from reproductive theory to explain the various phenomena indicated in the many case histories and scientific investigations presented. All of us will someday cross the border to what Shakespeare called "The undiscovered country." As long as we must make that trip, wouldn’t it be smart to find out where we are going and what to expect when we get there?

    But this makes the jobs of sexologists - professionals who study sexual behaviour - pretty difficult.Luckily, David Spiegelhalter, Professor of Risk at Cambridge University, is here to unravel the web of exaggerations, misdirections and downright lies that surround sex in modern society. Drawing on the Natsal survey, the widest survey of sexual behaviour since the Kinsey Report, he answers crucial questions such as what are we all doing? How often? And how has it changed?Accompanying a major Wellcome exhibition on the same subject, Sex by Numbers is an informed and entertaining look at the most enduring of human obsessions, from one-night stands to the seven-year itch.

    Traditional mathematics teaching is largely about solving exactly stated problems exactly, yet life often hands us partly defined problems needing only moderately accurate solutions. This engaging book is an antidote to the rigor mortis brought on by too much mathematical rigor, teaching us how to guess answers without needing a proof or an exact calculation.In Street-Fighting Mathematics, Sanjoy Mahajan builds, sharpens, and demonstrates tools for educated guessing and down-and-dirty, opportunistic problem solving across diverse fields of knowledge--from mathematics to management. Mahajan describes six tools: dimensional analysis, easy cases, lumping, picture proofs, successive approximation, and reasoning by analogy. Illustrating each tool with numerous examples, he carefully separates the tool--the general principle--from the particular application so that the reader can most easily grasp the tool itself to use on problems of particular interest. Street-Fighting Mathematics grew out of a short course taught by the author at MIT for students ranging from first-year undergraduates to graduate students ready for careers in physics, mathematics, management, electrical engineering, computer science, and biology. They benefited from an approach that avoided rigor and taught them how to use mathematics to solve real problems.Street-Fighting Mathematics will appear in print and online under a Creative Commons Noncommercial Share Alike license.

    Freeman Dyson, renowned physicist and public intellectual, edits this year’s volume of the finest science and nature writing.

    The First seven chapters deal with structure related aspects such as lattice and crystal structures, bonding, packing and diffusion of atoms followed by imperfections and lattice vibrations. Chapter eight deals mainly with experimental methods of determining structures of given materials. While the next nine chapters cover various physical properties of crystalline solids, the last chapter deals with the anisotropic properties of materials. This chapter has been added for benefit of readers to understand the crystal properties (anisotropic) in terms of some simple mathematical formulations such as tensor and matrix. New to the Second Edition: Chapter on: *Anisotropic Properties of Materials

    Have you ever wondered why ice floats and water is such a freaky liquid? Or why chillies and mustard are both hot but in different ways? Or why microwaves don't cook from the inside out? In this fascinating scientific tour of household objects, The One Show presenter and all-round Science Bloke Marty Jopson has the answer to all of these, and many more, baffling questions about the chemistry and physics of the everyday stuff we use every day.

    This book will offer students a broad outline of essential mathematics and will help to fill in the gaps in their knowledge. The author explains the basic points and a few key results of all the most important undergraduate topics in mathematics, emphasizing the intuitions behind the subject. The topics include linear algebra, vector calculus, differential and analytical geometry, real analysis, point-set topology, probability, complex analysis, set theory, algorithms, and more. An annotated bibliography offers a guide to further reading and to more rigorous foundations.

    Contributors include Steven Weinberg, Peter Galison, John Maynard Smith, and Frank Wilczek.

    This friendly guide answers all your questions, from setting up your tank and selecting fish to the water, chemicals, plants, and much more. There's also expanded guidance on combining different species of fish, maintaining a tank, cleaning gravel, and dealing with common problems such as algae. Discover how to * Choose the right aquarium * Select the best fish * Get good deals on equipment * Maintain a clean, healthy environment * Handle tank pitfalls * Breed your fish

    Scientists have discovered that the way cats and dogs lap up liquids can be explained by the laws of surface tension, how ants navigate is due to polarized light, and why pistol shrimps can generate enough force to destroy aquarium glass using their ”elbows”!Each of FURRY LOGIC's six chapters tackles a separate branch of physics and, through more than 30 animal case studies, examines each creature's key features before describing the ways physics is at play in its life, how the connection between physics and animal behavior was discovered, and what remains to be found out. Science journalists Matin Durrani and Liz Kalaugher make the incredible interdisciplinary world of animals accessible to all, in an enthralling and entertaining read.

    The first half of the book deals with classical physical optics; the second principally with the quantum nature of light. Chapters 1 and 2 treat the propagation of light waves, including the concepts of phase and group velocities, and the vectorial nature of light. Chapter 3 applies the concepts of partial coherence and coherence length to the study of interference, and Chapter 4 takes up multiple-beam interference and includes Fabry-Perot interferometry and multilayer-film theory. Diffraction and holography are the subjects of Chapter 5, and the propagation of light in material media (including crystal and nonlinear optics) are central to Chapter 6. Chapters 7 and 8 introduce the quantum theory of light and elementary optical spectra, and Chapter 9 explores the theory of light amplification and lasers. Chapter 10 briefly outlines ray optics in order to introduce students to the matrix method for treating optical systems and to apply the ray matrix to the study of laser resonators.Many applications of the laser to the study of optics are integrated throughout the text. The author assumes students have had an intermediate course in electricity and magnetism and some advanced mathematics beyond calculus. For classroom use, a list of problems is included at the end of each chapter, with selected answers at the end of the book.

    Natalie Angier probes the origins of language, Paul Raffaele describes a remote Amazonian tribe untouched by the modern world, and Frans B. M. de Waal explains what a new breed of economists is learning from monkeys. Drake Bennett profiles the creator of Ecstasy and more than two hundred other psychedelic compounds -- a man hailed by some as one of the twentieth century's most important scientists.Some of the selections reflect the news of the past year. Daniel C. Dennett questions the debate over intelligent design -- is evolution just a theory? --while Chris Mooney reports on how this debate almost tore one small town apart. John Hockenberry examines how blogs are transforming the twenty-first-century battlefield, Larry Cahill probes the new science uncovering male and female brain differences, Daniel Roth explains why the programmer who made it easy to pirate movies over the Internet is now being courted by Hollywood, and Charles C. Mann looks at the dark side of increased human life expectancy.Reaching out beyond our own planet, Juan Maldacena questions whether we actually live in a three-dimensional world and whether gravity truly exists. Dennis Overbye surveys the continuing scientific mystery of time travel, and Robert Kunzig describes new x-ray images of the heavens, including black holes, exploding stars, colliding galaxies, and other wonders the eye can't see.

    Captioned cartoon drawings offering an overview of universal order as they deal with various phenomena are combined with scientific commentary