It explains all this and much more. It discloses the best time to have a sex change, how to have a virgin birth, when to seduce your sisters or eat your lover. Quirky and brilliant, it takes as its starting point all creatures great and small worried about their bizarre sex lives, and the letters they write to the wise Dr Tatiana, the only agony aunt in all creation with a prodigious knowledge of both natural history and evolutionary biology.

    When Dr Ben Goldacre saw someone on daytime TV dipping her feet in an 'Aqua Detox' footbath, releasing her toxins into the water, turning it brown, he thought he'd try the same at home. 'Like some kind of Johnny Ball cum Witchfinder General', using his girlfriend's Barbie doll, he gently passed an electrical current through the warm salt water. It turned brown. In his words: 'before my very eyes, the world's first Detox Barbie was sat, with her feet in a pool of brown sludge, purged of a weekend's immorality.' Dr Ben Goldacre is the author of the Bad Science column in the Guardian. His book is about all the 'bad science' we are constantly bombarded with in the media and in advertising. At a time when science is used to prove everything and nothing, everyone has their own 'bad science' moments from the useless pie-chart on the back of cereal packets to the use of the word 'visibly' in cosmetics ads.

    This special, large-format volume is geared as much to nonbirders as it is to the out-and-out obsessed, covering more than two hundred species and including more than 330 new illustrations by the author. While its focus is on familiar backyard birds--blue jays, nuthatches, chickadees--it also examines certain species that can be fairly easily observed, such as the seashore-dwelling Atlantic puffin. David Sibley's artwork and expertise bring observed behaviors vividly to life. (For most species, the primary illustration is reproduced life-sized.) And while the text is aimed at adults--including fascinating new scientific research on the myriad ways birds have adapted to environmental changes--it is nontechnical, making it the perfect occasion for parents and grandparents to share their love of birds with young children, who will delight in the big, full-color illustrations of birds in action.

    Jack Olsen's true account, traces the causes of the tragic night in August 1967 when two separate and unrelated campers, a distance apart, were savagely mangled and killed by enraged bears.

    In simple, clear, concise terms the basics of map and compass work are described and illustrated." --George T. Hamilton, Appalachia This new, enlarged edition of Be Expert with Map & Compass includes everything the beginner needs to know about the increasingly popular sport of Orienteering: understanding map symbols; traveling by map alone, by compass alone, or by map and compass together; finding bearings; sketching maps; and traveling in the wilderness. Other updated sections cover competitive Orienteering, how to join an Orienteering event or organize your own, and useful hints for competitive and wilderness Orienteering. In addition to the revisions throughout, the author has interspersed the text with reminiscences of his more than fifty years of experience with map and compass. Drawing crowds of 25,000 participants at international events, the sport of Orienteering is more popular than ever. The Orienteering world championships were held in the United States for the first time in 1993. For Orienteers and scouts, avid outdoorspeople, and anyone who wants to feel more comfortable in the wilderness, this updated guide is an indispensable reference.

    Scott Jurek is one of the world's best known and most beloved ultrarunners. Renowned for his remarkable endurance and speed, accomplished on a vegan diet, he's finished first in nearly all of ultrarunning's elite events over the course of his career. But after two decades of racing, training, speaking, and touring, Jurek felt an urgent need to discover something new about himself. He embarked on a wholly unique challenge, one that would force him to grow as a person and as an athlete: breaking the speed record for the Appalachian Trail. North is the story of the 2,189-mile journey that nearly shattered him. When he set out in the spring of 2015, Jurek anticipated punishing terrain, forbidding weather, and inevitable injuries. He would have to run nearly 50 miles a day, every day, for almost seven weeks. He knew he would be pushing himself to the limit, that comfort and rest would be in short supply -- but he couldn't have imagined the physical and emotional toll the trip would exact, nor the rewards it would offer. With his wife, Jenny, friends, and the kindness of strangers supporting him, Jurek ran, hiked, and stumbled his way north, one white blaze at a time. A stunning narrative of perseverance and personal transformation, North is a portrait of a man stripped bare on the most demanding and transcendent effort of his life. It will inspire runners and non-runners alike to keep striving for their personal best.

    Architectural marvels, including the M.C. Escher-like stepwells in India. Mind-boggling events, like the Baby Jumping Festival in Spain, where men dressed as devils literally vault over rows of squirming infants. Not to mention the Great Stalacpipe Organ in Virginia, Turkmenistan’s 45-year hole of fire called the Door of Hell, coffins hanging off a side of a cliff in the Philippines, eccentric bone museums in Italy, or a weather-forecasting invention that was powered by leeches, still on display in Devon, England.Atlas Obscura revels in the weird, the unexpected, the overlooked, the hidden, and the mysterious. Every page expands our sense of how strange and marvelous the world really is. And with its compelling descriptions, hundreds of photographs, surprising charts, maps for every region of the world, it is a book you can open anywhere.

    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.