The books published on the subject are so technical that only a person trained in pure physics and higher mathematics is able to fully understand them. In order to make a popular explanation of this far-reaching theory available, the present book is published.

    G. Wells' 1895 classic The Time Machine, readers of science fiction have puzzled over the paradoxes of time travel. What would happen if a time traveler tried to change history? Would some force or law of nature prevent him? Or would his action produce a "new" history, branching away from the original?In the last decade of the twentieth century a group of theoretical physicists at the California Institute of Technology undertook a serious investigation of the possibility of pastward time travel, inspiring a serious and sustained study that engaged more than thirty physicists working at universities and institutes around the world.Many of the figures involved are familiar: Einstein, Stephen Hawking and Kip Thorne; others are names known mostly to physicists. These are the new time travelers, and this is the story of their work--a profoundly human endeavor marked by advances, retreats, and no small share of surprises. It is a fantastic journey to the frontiers of physics.

    At the dawn of the Industrial Revolution in eighteenth-century England, standards of measurement were established, giving way to the development of machine tools—machines that make machines. Eventually, the application of precision tools and methods resulted in the creation and mass production of items from guns and glass to mirrors, lenses, and cameras—and eventually gave way to further breakthroughs, including gene splicing, microchips, and the Hadron Collider.Simon Winchester takes us back to origins of the Industrial Age, to England where he introduces the scientific minds that helped usher in modern production: John Wilkinson, Henry Maudslay, Joseph Bramah, Jesse Ramsden, and Joseph Whitworth. It was Thomas Jefferson who later exported their discoveries to the fledgling United States, setting the nation on its course to become a manufacturing titan. Winchester moves forward through time, to today’s cutting-edge developments occurring around the world, from America to Western Europe to Asia.As he introduces the minds and methods that have changed the modern world, Winchester explores fundamental questions. Why is precision important? What are the different tools we use to measure it? Who has invented and perfected it? Has the pursuit of the ultra-precise in so many facets of human life blinded us to other things of equal value, such as an appreciation for the age-old traditions of craftsmanship, art, and high culture? Are we missing something that reflects the world as it is, rather than the world as we think we would wish it to be? And can the precise and the natural co-exist in society?

    A desperate search for reunion with dead loved ones precipitated a tidal wave of self-proclaimed psychics—and, as reputable media sought stories on occult phenomena, mediums became celebrities. Against this backdrop, in 1924, the pretty wife of a distinguished Boston surgeon came to embody the raging national debate over Spiritualism, a movement devoted to communication with the dead. Reporters dubbed her the blonde Witch of Lime Street, but she was known to her followers simply as Margery. Her most vocal advocate was none other than Sherlock Holmes' creator Sir Arthur Conan Doyle, who believed so thoroughly in Margery's powers that he urged her to enter a controversial contest, sponsored by Scientific American and offering a large cash prize to the first medium declared authentic by its impressive five-man investigative committee.  Admired for both her exceptional charm and her dazzling effects, Margery was the best hope for the psychic practice to be empirically verified.  Her supernatural gifts beguiled four of the judges. There was only one left to convince...the acclaimed escape artist, Harry Houdini.David Jaher's extraordinary debut culminates in the showdown between Houdini, a relentless unmasker of charlatans, and Margery, the nation's most credible spirit medium. The Witch of Lime Street, the first book to capture their electric public rivalry and the competition that brought them into each other’s orbit, returns us to an oft-mythologized era to deepen our understanding of its history, all while igniting our imagination and engaging with the timeless question: Is there life after death?

    A group of young scientists, under the guidance of Dr. George Church, the most brilliant geneticist of our time, works to make fantasy reality by sequencing the DNA of a frozen woolly mammoth harvested from above the Arctic circle, and splicing elements of that sequence into the DNA of a modern elephant. Will they be able to turn the hybrid cells into a functional embryo and bring the extinct creatures to life in our modern world?Along with Church and his team of Harvard scientists, a world-famous conservationist and a genius Russian scientist plan to turn a tract of the Siberian tundra into Pleistocene Park, populating the permafrost with ancient herbivores as a hedge against an environmental ticking time bomb.

    A Paramedic's Diary is his gripping, blow-by-blow account of a year on the streets - 12 roller-coaster months of enormous highs and tragic lows. One day he'll save a young mother's life as she gives birth, the next he might watch a young girl die on the tarmac in front of him after a hit-and-run. His is a world of hoax calls, drunks and druggies, terrorist bombings and gangland shootings. A gripping, entertaining and often amusing read. About the author:Stuart Gray has been a guest on Saturday Live on Radio 4 and the Simon Mayo Show and the Donal MacIntyre Show on Radio Five Live.He has also appeared on TV in Bizarre ER. The Times named him one of the 40 Bloggers who really count and said that he 'encounters more blood-curdling drama on a single shift than most people would in a year' and that his writing is 'compelling and plainly written.'

    In The Poisoner's Handbook Blum draws from highly original research to track the fascinating, perilous days when a pair of forensic scientists began their trailblazing chemical detective work, fighting to end an era when untraceable poisons offered an easy path to the perfect crime. Drama unfolds case by case as the heroes of The Poisoner's Handbook—chief medical examiner Charles Norris and toxicologist Alexander Gettler—investigate a family mysteriously stricken bald, Barnum and Bailey's Famous Blue Man, factory workers with crumbling bones, a diner serving poisoned pies, and many others. Each case presents a deadly new puzzle and Norris and Gettler work with a creativity that rivals that of the most imaginative murderer, creating revolutionary experiments to tease out even the wiliest compounds from human tissue. Yet in the tricky game of toxins, even science can't always be trusted, as proven when one of Gettler's experiments erroneously sets free a suburban housewife later nicknamed "America's Lucretia Borgia" to continue her nefarious work. From the vantage of Norris and Gettler's laboratory in the infamous Bellevue Hospital it becomes clear that killers aren't the only toxic threat to New Yorkers. Modern life has created a kind of poison playground, and danger lurks around every corner. Automobiles choke the city streets with carbon monoxide; potent compounds, such as morphine, can be found on store shelves in products ranging from pesticides to cosmetics. Prohibition incites a chemist's war between bootleggers and government chemists while in Gotham's crowded speakeasies each round of cocktails becomes a game of Russian roulette. Norris and Gettler triumph over seemingly unbeatable odds to become the pioneers of forensic chemistry and the gatekeepers of justice during a remarkably deadly time. A beguiling concoction that is equal parts true crime, twentieth-century history, and science thriller, The Poisoner's Handbook is a page-turning account of a forgotten New York.

    You may find it for free on the web. Purchase of the Kindle edition includes wireless delivery.

    Among them would be history makers, including the first American woman and the first African American in space. This assembly of astronauts would carry NASA through the most tumultuous years of the space shuttle program. Four would die on Challenger. USAF Colonel Mike Mullane was a member of this astronaut class, and Riding Rockets is his story -- told with a candor never before seen in an astronaut's memoir. Mullane strips the heroic veneer from the astronaut corps and paints them as they are -- human. His tales of arrested development among military flyboys working with feminist pioneers and post-doc scientists are sometimes bawdy, often hilarious, and always entertaining. Mullane vividly portrays every aspect of the astronaut experience -- from telling a female technician which urine-collection condom size is a fit; to walking along a Florida beach in a last, tearful goodbye with a spouse; to a wild, intoxicating, terrifying ride into space; to hearing "Taps" played over a friend's grave. Mullane is brutally honest in his criticism of a NASA leadership whose bungling would precipitate the Challenger disaster. Riding Rockets is a story of life in all its fateful uncertainty, of the impact of a family tragedy on a nine-year-old boy, of the revelatory effect of a machine called Sputnik, and of the life-steering powers of lust, love, and marriage. It is a story of the human experience that will resonate long after the call of "Wheel stop."

    state of Delaware in the Brazilian Amazon. His intention was to grow rubber, but the project rapidly evolved into a more ambitious bid to export America itself, along with its golf courses, ice-cream shops, bandstands, indoor plumbing, and Model Ts rolling down broad streets.Fordlandia, as the settlement was called, quickly became the site of an epic clash. On one side was the car magnate, lean, austere, the man who reduced industrial production to its simplest motions; on the other, the Amazon, lush, extravagant, the most complex ecological system on the planet. Ford's early success in imposing time clocks and square dances on the jungle soon collapsed, as indigenous workers, rejecting his midwestern Puritanism, turned the place into a ribald tropical boomtown. Fordlandia's eventual demise as a rubber plantation foreshadowed the practices that today are laying waste to the rain forest. More than a parable of one man's arrogant attempt to force his will on the natural world, Fordlandia depicts a desperate quest to salvage the bygone America that the Ford factory system did much to dispatch. As Greg Grandin shows in this gripping and mordantly observed history, Ford's great delusion was not that the Amazon could be tamed but that the forces of capitalism, once released, might yet be contained.

    This discovery dramatically reshaped how humans understood their place in the cosmos, and once and for all laid to rest the idea that the Milky Way galaxy was alone in the universe. Six years later, continuing research by Hubble and others forced Albert Einstein to renounce his own cosmic model and finally accept the astonishing fact that the universe was not immobile but instead expanding. The fascinating story of these interwoven discoveries includes battles of will, clever insights, and wrong turns made by the early investigators in this great twentieth-century pursuit. It is a story of science in the making that shows how these discoveries were not the work of a lone genius but the combined efforts of many talented scientists and researchers toiling away behind the scenes. The intriguing characters include Henrietta Leavitt, who discovered the means to measure the vast dimensions of the cosmos . . . Vesto Slipher, the first and unheralded discoverer of the universe’s expansion . . . Georges Lemaître, the Jesuit priest who correctly interpreted Einstein’s theories in relation to the universe . . . Milton Humason, who, with only an eighth-grade education, became a world-renowned expert on galaxy motions . . . and Harlow Shapley, Hubble’s nemesis, whose flawed vision of the universe delayed the discovery of its true nature and startling size for more than a decade.Here is a watershed moment in the history of astronomy, brought about by the exceptional combination of human curiosity, intelligence, and enterprise, and vividly told by acclaimed science writer Marcia Bartusiak.

    Most of the time this math works quietly behind the scenes . . . until it doesn't. All sorts of seemingly innocuous mathematical mistakes can have significant consequences.Math is easy to ignore until a misplaced decimal point upends the stock market, a unit conversion error causes a plane to crash, or someone divides by zero and stalls a battleship in the middle of the ocean.Exploring and explaining a litany of glitches, near misses, and mathematical mishaps involving the internet, big data, elections, street signs, lotteries, the Roman Empire, and an Olympic team, Matt Parker uncovers the bizarre ways math trips us up, and what this reveals about its essential place in our world. Getting it wrong has never been more fun.

    His book A Brief History of Time has sold five and a half million copies worldwide and familiarized a whole generation with complex and intensely exciting scientific theories. When Kitty Ferguson approached Stephen Hawking with the idea of writing a book about him and asked him to make certain she understood his theories, he agreed to do so and in addition supplied her with material about his childhood and life. She also interviewed other eminent physicists about the next frontier of physics. The result is a book that is not a biography per se. Rather, it is the story of one man's quest to find the Theory of Everything--a theory that would be nothing short of an explanation of the universe and everything that happens in it. Illustrated with personal photographs and numerous charts and drawings, this book is an invaluable volume for all who would like to know more about the man and his work.

    Nearly a half-century after Neil Armstrong walked on the moon, these Space Barons-most notably Elon Musk and Jeff Bezos, along with Richard Branson and Paul Allen-are using Silicon Valley-style innovation to dramatically lower the cost of space travel, and send humans even further than NASA has gone. These entrepreneurs have founded some of the biggest brands in the world-Amazon, Microsoft, Virgin, Tesla, PayPal-and upended industry after industry. Now they are pursuing the biggest disruption of all: space. Based on years of reporting and exclusive interviews with all four billionaires, this authoritative account is a dramatic tale of risk and high adventure, the birth of a new Space Age, fueled by some of the world's richest men as they struggle to end governments' monopoly on the cosmos. The Space Barons is also a story of rivalry-hard-charging startups warring with established contractors, and the personal clashes of the leaders of this new space movement, particularly Musk and Bezos, as they aim for the moon and Mars and beyond.

    Plait created his popular web site: http://www.badastronomy.com/index.html, to debunk bad astronomy in popular culture. This website proved popular, which led to this first book by Plait, that carries on from the website and in a detailed and clear fashion criticises and disproves popular myths and misconceptions relating to astronomy, and promotes science as a means of explaining the skies. The work describes 24 common astronomical fallacies, including the beliefs that the Coriolis effect determines the direction that water drains in a bathtub, and that planetary alignments can cause disaster on Earth. The author sharply and convincingly dismisses astrology, creationism, and UFO sightings, and explains the principles behind basic general concepts (the Big Bang, why the sky is blue, etc.).