In fact, a plethora of parasites affect our behavior in ways we have barely begun to understand.  In this mind-bending book, McAuliffe reveals the eons-old war between parasites and other creatures that is playing out in our very own bodies. And more surprising still, she uncovers the decisive role that parasites may have played in the rise and demise of entire civilizations. Our obsession with cleanliness and our experience of disgust are both evolutionary tools for avoiding infection, but they evolved differently for different populations. Political, social, and religious differences among societies may be caused, in part, by the different parasites that prey on us. In the tradition of Jared Diamond’s Guns, Germs, and Steel and Neil Shubin’s Your Inner Fish, This Is Your Brain on Parasites is both a journey into cutting-edge science and a revelatory examination of what it means to be human.

    Its presence in nature was dismissed as a desperate response to starvation or other life-threatening circumstances, and few spent time studying it. A taboo subject in our culture, the behavior was portrayed mostly through horror movies or tabloids sensationalizing the crimes of real-life flesh-eaters. But the true nature of cannibalism--the role it plays in evolution as well as human history--is even more intriguing (and more normal) than the misconceptions we've come to accept as fact. In Cannibalism: A Perfectly Natural History, zoologist Bill Schutt sets the record straight, debunking common myths and investigating our new understanding of cannibalism's role in biology, anthropology, and history in the most fascinating account yet written on this complex topic. Schutt takes readers from Arizona's Chiricahua Mountains, where he wades through ponds full of tadpoles devouring their siblings, to the Sierra Nevadas, where he joins researchers who are shedding new light on what happened to the Donner Party--the most infamous episode of cannibalism in American history. He even meets with an expert on the preparation and consumption of human placenta (and, yes, it goes well with Chianti). Bringing together the latest cutting-edge science, Schutt answers questions such as why some amphibians consume their mother's skin; why certain insects bite the heads off their partners after sex; why, up until the end of the twentieth century, Europeans regularly ate human body parts as medical curatives; and how cannibalism might be linked to the extinction of the Neanderthals. He takes us into the future as well, investigating whether, as climate change causes famine, disease, and overcrowding, we may see more outbreaks of cannibalism in many more species--including our own.Cannibalism places a perfectly natural occurrence into a vital new context and invites us to explore why it both enthralls and repels us.

    Frances E. Jensen, a mother, teacher, researcher, and internationally known expert in neurology, introduces us to the mystery and magic of the teen brain. One of the first books to focus exclusively on the neurological development of adolescents, The Teenage Brain presents new findings, dispels widespread myths, and provides practical suggestions for negotiating this difficult and dynamic life stage for both adults and adolescents.Interweaving easy-to-follow scientific data with anecdotes drawn from her experiences as a parent, clinician, and public speaker, Dr. Jensen explores adolescent brain functioning and development, including learning and memory, and investigates the impact of influences such as drugs, multitasking, sleep, and stress. The Teenage Brain reveals how: Adolescents may not be as resilient to the effects of drugs as we previously thought. Occasional use of marijuana has been shown to cause lingering memory problems, and long-term use can affect later adulthood I.Q. Multi-tasking causes divided attention and can reduce learning ability. Emotionally stressful situations in adolescence can have permanent effects on mental health, and may lead to higher risk for certain neuropsychiatric disorders such as depression.Rigorous yet accessible, warm yet direct, The Teenage Brain sheds new light on young adults, and provides practical suggestions for how parents, schools, and even the legal system can better help them during this crucial period.

    Chaser has a way with words. She knows over a thousand of them—more than any other animal of any species except humans. In addition to common nouns like house, ball, and tree, she has memorized the names of more than one thousand toys and can retrieve any of them on command. Based on that learning, she and her owner and trainer, retired psychologist John Pilley, have moved on to further impressive feats, demonstrating her ability to understand sentences with multiple elements of grammar and to learn new behaviors by imitation. John’s ingenuity and tenacity as a researcher are as impressive as Chaser’s accomplishments. His groundbreaking approach has opened the door to a new understanding of animal intelligence, one that requires us to reconsider what actually goes on in a dog’s mind. Chaser’s achievements reveal her use of deductive reasoning and complex problem-solving skills to address novel challenges. Yet astonishingly, Chaser isn’t unique. John’s training methods can be adopted by any dog lover. Through the poignant story of how he trained Chaser, raised her as a member of the Pilley family, and proved her abilities to the scientific community, he reveals the positive impact of incorporating learning into play and more effectively channeling a dog’s natural drives. John’s work with Chaser offers a fresh perspective on what’s possible in the relationship between a dog and a human. His story points us toward a new way of relating to our canine companions that takes into account our evolving understanding of the way animals and humans learn.

    And sugar is at the root of these, and other, critical society-wide, health-related problems. With his signature command of both science and straight talk, Gary Taubes delves into Americans' history with sugar: its uses as a preservative, as an additive in cigarettes, the contemporary overuse of high-fructose corn syrup. He explains what research has shown about our addiction to sweets. He clarifies the arguments against sugar, corrects misconceptions about the relationship between sugar and weight loss; and provides the perspective necessary to make informed decisions about sugar as individuals and as a society.

    Parlez-vous Doggish? At long last, dogs will know just how smart their owners can be. By unlocking the secrets of the hidden language of dogs, psychologist Stanley Coren allows us into the doggy dialogue, or “Doggish,” and makes effective communication a reality. Drawing on substantial research in animal behavior, evolutionary biology, and years of personal experience, Coren demonstrates that the average house dog can understand language at about the level of a two-year-old human. While actual conversation of the sort Lassie seemed capable of in Hollywood mythmaking remains forever out of reach, Coren shows us that a great deal of real communication is possible beyond the giving and obeying of commands. How to Speak Dog not only provides the sounds, words, actions, and movements with which we can effectively communicate with our dogs, but also deciphers the signs that our dogs give to us. With easy-to-follow tips on how humans can mimic the language dogs use to talk with one another, original drawings illustrating the subtleties of their body language, and a handy visual glossary and “Doggish” phrasebook, How to Speak Dog gives dog lovers the skills they need to improve their relationships with their pets.

    It's ever-present. Without it, you would die in minutes. And it has an epic story to tell.In Caesar's Last Breath, New York Times bestselling author Sam Kean takes us on a journey through the periodic table, around the globe, and across time to tell the story of the air we breathe, which, it turns out, is also the story of earth and our existence on it.With every breath, you literally inhale the history of the world. On the ides of March, 44 BC, Julius Caesar died of stab wounds on the Senate floor, but the story of his last breath is still unfolding; in fact, you're probably inhaling some of it now. Of the sextillions of molecules entering or leaving your lungs at this moment, some might well bear traces of Cleopatra's perfumes, German mustard gas, particles exhaled by dinosaurs or emitted by atomic bombs, even remnants of stardust from the universe's creation.Tracing the origins and ingredients of our atmosphere, Kean reveals how the alchemy of air reshaped our continents, steered human progress, powered revolutions, and continues to influence everything we do. Along the way, we'll swim with radioactive pigs, witness the most important chemical reactions humans have discovered, and join the crowd at the Moulin Rouge for some of the crudest performance art of all time. Lively, witty, and filled with the astounding science of ordinary life, Caesar's Last Breath illuminates the science stories swirling around us every second.

    But when he arrived, Sherman was in such bad shape he could barely move, and his hair was coming out in clumps. Chris decided to undertake a radical rehabilitation program designed not only to heal Sherman's body but to heal his mind as well. It turns out the best way to soothe a donkey is to give it a job, and so Chris decided to teach Sherman how to run. He'd heard about burro racing--a unique type of race where humans and donkeys run together in a call-back to mining days--and decided he and Sherman would enter the World Championship in Colorado.Easier said than done. In the course of Sherman's training, Chris would have to recruit several other runners, both human and equine, and call upon the wisdom of burro racers, goat farmers, Amish running club members, and a group of irrepressible female long-haul truckers. Along the way, he shows us the life-changing power of animals, nature, and community.

    He’s a sociopath. And your boss, teacher, and colleague? They may be sociopaths too.We are accustomed to think of sociopaths as violent criminals, but in The Sociopath Next Door, Harvard psychologist Martha Stout reveals that a shocking 4 percent of ordinary people—one in twenty-five—has an often undetected mental disorder, the chief symptom of which is that that person possesses no conscience. He or she has no ability whatsoever to feel shame, guilt, or remorse. One in twenty-five everyday Americans, therefore, is secretly a sociopath. They could be your colleague, your neighbor, even family. And they can do literally anything at all and feel absolutely no guilt. How do we recognize the remorseless? One of their chief characteristics is a kind of glow or charisma that makes sociopaths more charming or interesting than the other people around them. They’re more spontaneous, more intense, more complex, or even sexier than everyone else, making them tricky to identify and leaving us easily seduced. Fundamentally, sociopaths are different because they cannot love. Sociopaths learn early on to show sham emotion, but underneath they are indifferent to others’ suffering. They live to dominate and thrill to win. The fact is, we all almost certainly know at least one or more sociopaths already. Part of the urgency in reading The Sociopath Next Door is the moment when we suddenly recognize that someone we know—someone we worked for, or were involved with, or voted for—is a sociopath. But what do we do with that knowledge? To arm us against the sociopath, Dr. Stout teaches us to question authority, suspect flattery, and beware the pity play. Above all, she writes, when a sociopath is beckoning, do not join the game. It is the ruthless versus the rest of us, and The Sociopath Next Door will show you how to recognize and defeat the devil you know.

    Amid the frenzied barking and prancing of a house full of Great Danes, one pup was shivering in the corner. Gracie. But when Dan Dye reached her, she struggled to her feet like a clumsy foal, raised her forehead to his, and announced, as clearly as if she had actually spoken the words, You know I'm the one. Now get me outta here! By turns funny, moving, tender, and inspiring, Gracie's tale is a treat for every dog lover. There is Gracie's first morning, racing around Dan in the snowy yard. Gracie's first determination to prove to her step-sisters, Dottie the Dalmatian and Sarah the Black Lab, that she's one of the girls. Gracie's defiant romance with a pint-size charmer named Byron, a Boston Terrier from the wrong side of the fence. Then born of necessity, the eureka moment: When Gracie's delicate constitution starts turning into anorexia, Dan teaches himself how to cook, and in three days is baking her the cookies that will spur her appetite, launch Three Dog Bakery, and transform their lives forever. Courage. Compassion. Kindness. Soul. Tenacity. And joy, above all, joy. These qualities Gracie possessed in abundance, and shared with everyone, human or canine, who had the good fortune to cross her path.

    Many people think of microbes as germs to be eradicated, but those that live with us—the microbiome—build our bodies, protect our health, shape our identities, and grant us incredible abilities. In this astonishing book, Ed Yong takes us on a grand tour through our microbial partners, and introduces us to the scientists on the front lines of discovery. Yong, whose humor is as evident as his erudition, prompts us to look at ourselves and our animal companions in a new light—less as individuals and more as the interconnected, interdependent multitudes we assuredly are. The microbes in our bodies are part of our immune systems and protect us from disease. Those in cows and termites digest the plants they eat. In the deep oceans, mysterious creatures without mouths or guts depend on microbes for all their energy. Bacteria provide squids with invisibility cloaks, help beetles to bring down forests, and allow worms to cause diseases that afflict millions of people. I Contain Multitudes is the story of these extraordinary partnerships, between the creatures we are familiar with and those we are not. It reveals how we humans are disrupting these partnerships and how we might manipulate them for our own good. It will change both our view of nature and our sense of where we belong in it.

    Stunned after hiring a trainer whose immediate rapport with Mercy seemed magical, Pierson began delving into the techniques of positive reinforcement. She made her way to B. F. Skinner, the behavioral psychologist who started it all, the man who could train a pigeon to dance in minutes and whose research on how behavior is acquired has ramifications for military dolphin trainers, athletes, dancers, and, as he originally conceived, society at large.To learn more, Pierson met with a host of fascinating animal behaviorists, going behind the scenes to witness the relationships between trainers and animals at the National Zoo in Washington, DC, and to the in-depth seminars at a Clicker Expo where all the dogs but hers seemed to be learning new tricks. The often startling story of what became of a pathbreaking scientist’s work is interwoven with a more personal tale of how to understand the foreign species with whom we are privileged to live.Pierson draws surprising connections in her exploration of how kindness works to motivate all animals, including the human one.

    Mainstream science--as well as religious and cultural institutions--has maintained that men and women evolved in families in which a man's possessions and protection were exchanged for a woman's fertility and fidelity. But this narrative is collapsing. Fewer and fewer couples are getting married, and divorce rates keep climbing as adultery and flagging libido drag down even seemingly solid marriages.How can reality be reconciled with the accepted narrative? It can't be, according to renegade thinkers Christopher Ryan and Cacilda Jethá. While debunking almost everything we "know" about sex, they offer a bold alternative explanation in this provocative and brilliant book.Ryan and Jethá's central contention is that human beings evolved in egalitarian groups that shared food, child care, and, often, sexual partners. Weaving together convergent, frequently overlooked evidence from anthropology, archaeology, primatology, anatomy, and psychosexuality, the authors show how far from human nature monogamy really is. Human beings everywhere and in every era have confronted the same familiar, intimate situations in surprisingly different ways. The authors expose the ancient roots of human sexuality while pointing toward a more optimistic future illuminated by our innate capacities for love, cooperation, and generosity.With intelligence, humor, and wonder, Ryan and Jethá show how our promiscuous past haunts our struggles over monogamy, sexual orientation, and family dynamics. They explore why long-term fidelity can be so difficult for so many; why sexual passion tends to fade even as love deepens; why many middle-aged men risk everything for transient affairs with younger women; why homosexuality persists in the face of standard evolutionary logic; and what the human body reveals about the prehistoric origins of modern sexuality.In the tradition of the best historical and scientific writing, Sex at Dawn unapologetically upends unwarranted assumptions and unfounded conclusions while offering a revolutionary understanding of why we live and love as we do.

    People all over the world have been riveted by the story of Cairo, the Belgian Malinois who was a part of the Navy SEAL team that led the raid on Osama bin Laden's compound. A dog's natural intelligence, physical abilities, and pure loyalty contribute more to our military efforts than ever before. You don't have to be a dog lover to be fascinated by the idea that a dog-the cousin of that furry guy begging for scraps under your table-could be one of the heroes who helped execute the most vital and high-tech military mission of the new millennium.Now Maria Goodavage, editor and featured writer for one of the world's most widely read dog blogs, tells heartwarming stories of modern soldier dogs and the amazing bonds that develop between them and their handlers. Beyond tales of training, operations, retirement, and adoption into the families of fallen soldiers, Goodavage talks to leading dog-cognition experts about why dogs like nothing more than to be on a mission with a handler they trust, no matter how deadly the IEDs they are sniffing, nor how far they must parachute or rappel from aircraft into enemy territory."Military working dogs live for love and praise from their handlers," says Ron Aiello, president of the United States War Dogs Association and a former marine scout dog handler. "The work is all a big game, and then they get that pet, that praise. They would do anything for their handler." This is an unprecedented window into the world of these adventurous, loving warriors.

    To the right listener, they tell us all about themselves: where they came from, how they lived, how they died - and who killed them. Forensic scientists can unlock the mysteries of the past and help justice to be done using the messages left by a corpse, a crime scene or the faintest of human traces. Forensics uncovers the secrets of forensic medicine, drawing on interviews with top-level professionals, ground-breaking research and Val McDermid's own experience to lay bare the secrets of this fascinating science. And, along the way, she wonders at how maggots collected from a corpse can help determine time of death, how a DNA trace a millionth the size of a grain of salt can be used to convict a killer and how a team of young Argentine scientists led by a maverick American anthropologist uncovered the victims of a genocide.In her crime novels, Val McDermid has been solving complex crimes and confronting unimaginable evil for years. Now, she's looking at the people who do it for real, and real crime scenes. It's a journey that will take her to war zones, fire scenes and autopsy suites, and bring her into contact with extraordinary bravery and wickedness, as she traces the history of forensics from its earliest beginnings to the cutting-edge science of the modern day.