But our burrowing roots go back to the very beginnings of animal life on earth. Without burrowing, the planet would be very different today. Many animal lineages alive now—including our own—only survived a cataclysmic meteorite strike 65 million years ago because they went underground.On a grander scale, the chemistry of the planet itself had already been transformed many millions of years earlier by the first animal burrows, which altered whole ecosystems. Every day we walk on an earth filled with an under-ground wilderness teeming with life. Most of this life stays hidden, yet these animals and their subterranean homes are ubiquitous, ranging from the deep sea to mountains, from the equator to the poles.Burrows are a refuge from predators, a safe home for raising young, or a tool to ambush prey. Burrows also protect animals against all types of natural disasters: fires, droughts, storms, meteorites, global warmings—and coolings. In a book filled with spectacularly diverse fauna, acclaimed paleontologist and ichnologist Anthony Martin reveals this fascinating, hidden world that will continue to influence and transform life on this planet.

    Far from preparing them for fulfilling relationships, viewing an endless stream of porn videos led to unexpected symptoms. Perhaps most surprisingly, for the first time in history erectile dysfunction was becoming a significant problem for young men. This led to one of the largest informal experiments in the history of science. Tens of thousands of people have tried abstaining from sexually stimulating material in a process they call ‘rebooting’. Many of them reported startling changes, from improved concentration and elevated mood to a greater capacity for real-life intimacy. Gary Wilson has listened to the stories of those who have tried giving up internet porn and related them to an account of how the reward system of the brain interacts with its environment. And now a growing body of research in neuroscience is confirming what these pioneers have discovered for themselves – internet pornography can be seriously addictive and damaging. In Your Brain on Porn Wilson provides a concise introduction to the phenomenon of internet porn addiction that draws on both first-person accounts and the findings of cognitive neuroscience. In a voice that is generous and humane, he also offers advice for those who want to stop using internet pornography. The publication of Your Brain on Porn is a landmark in our attempts to understand, and remain balanced in, a world where addiction is big business.

    

    The experienced author team have reviewed the core text, expanded the Applications of Biology chapters, and added two new chapters on practical skills. Each chapter now has a set of exam-style practice questions, as well as questions to help review the material. Also included are advice on how to revise and prepare for the examinations, multiple choice questions, revision summaries and answers to all book questions.

     Dr. John Lee will help you answer key questions like: Are my symptoms caused by a hormonal imbalance? Which hormones do I need to regain hormone balance? How do I use hormones for optimal health and balance? Plus, learn how and when to use estrogen, testosterone and progesterone cream, in simple, effective language. If you want the ABCs of using natural hormones, this book is for you.

    After 3.8 billion years humankind is about to start evolving by new rules...From leading geopolitical expert and technology futurist Jamie Metzl comes a groundbreaking exploration of the many ways genetic-engineering is shaking the core foundations of our lives -- sex, war, love, and death.At the dawn of the genetics revolution, our DNA is becoming as readable, writable, and hackable as our information technology. But as humanity starts retooling our own genetic code, the choices we make today will be the difference between realizing breathtaking advances in human well-being and descending into a dangerous and potentially deadly genetic arms race.Enter the laboratories where scientists are turning science fiction into reality. Look towards a future where our deepest beliefs, morals, religions, and politics are challenged like never before and the very essence of what it means to be human is at play. When we can engineer our future children, massively extend our lifespans, build life from scratch, and recreate the plant and animal world, should we?

    Scott guides readers through the latest advances in stem cell research in clear, accessible language, telling the stories of the researchers who are exploring the potential of stem cells to cure cancer, grow new organs, and repair the immune system. He also leads readers through a discussion of the question at the heart of the explosive ethical debate: How, as a society, do we balance our responsibilities to the unborn and the sick? Stem Cell Now is essential reading for anyone who wants to build an informed opinion on stem cell research.

    Part comedy, part anthropological study, here is everything Sara Pascoe has learned from scientists, sex education teachers, pornographers and 90s films about love, cruelty, domination, masculinity, status, and economic pressures.Is internet porn ruining marriage?'Mind Rape' isn't a thing, is it?Like her much-loved first book, Animal, Pascoe overthinks and overshares in the name of our entertainment and education.Sex Power Money is a whip-smart, winningly funny look into who – and what – we are, and what makes us tick.

    Learn about the two main vitamin groups and the major mineral elements. This free ebook, Nutrition: vitamins and minerals, looks at the two main groups of vitamins: the fat-soluble vitamins, A, D, E and K; and the water-soluble vitamins, the B group and vitamin C. It also examines the major mineral elements, and the importance of fluid balance in the body.

    As a result, we've come to accept that boys can't focus in a classroom and girls are obsessed with relationships. That's just the way they're built. In Pink Brain Blue Brain, neuroscientist Lise Eliot turns that thinking on its head. Based on years of exhaustive research and her own work in the new field of plasticity, Eliot argues that infant brains are so malleable that a few small differences at birth become amplified over time, as parents and teachers—and the culture at large—unwittingly reinforce gender stereotypes. Perhaps surprisingly, children themselves exacerbate the differences, by playing to their modest strengths. They constantly exercise those “ball-throwing” or “doll-cuddling” circuits, rarely straying from their comfort zones. But this, says Eliot, is just what they need to do. And parents can help, if they know how and when to intervene. Presenting the latest science at every developmental stage, from birth to puberty, she zeroes in on the precise differences between boys and girls, erasing harmful stereotypes. Boys are not, in fact, “better at math” but at certain kinds of spatial reasoning. Girls are not naturally more empathetic, they’re just encouraged to express their feelings. By appreciating how sex differences emerge—rather than assuming them to be fixed biological facts—we can help all children reach their fullest potential, close the troubling gaps between boys and girls, and ultimately end the gender wars that currently divide us.

    So where is it? Well, for reasons this book makes crystal clear, that pill will never exist—but as a result of the research that’s gone into it, scientists in the last few years have learned more about how women’s sexuality works than we ever thought possible, and Come as You Are explains it all.The first lesson in this essential, transformative book by Dr. Emily Nagoski is that every woman has her own unique sexuality, like a fingerprint, and that women vary more than men in our anatomy, our sexual response mechanisms, and the way our bodies respond to the sexual world. So we never need to judge ourselves based on others’ experiences. Because women vary, and that’s normal.Second lesson: sex happens in a context. And all the complications of everyday life influence the context surrounding a woman’s arousal, desire, and orgasm. Cutting-edge research across multiple disciplines tells us that the most important factor for women in creating and sustaining a fulfilling sex life, is not what you do in bed or how you do it, but how you feel about it. Which means that stress, mood, trust, and body image are not peripheral factors in a woman’s sexual wellbeing; they are central to it. Once you understand these factors, and how to influence them, you can create for yourself better sex and more profound pleasure than you ever thought possible.And Emily Nagoski can prove it.

    Charting the most cutting-edge scientific breakthroughs, and marshalling his decades of research and clinical practice, Walker explains how we can harness sleep to improve learning, mood and energy levels, regulate hormones, prevent cancer, Alzheimer's and diabetes, slow the effects of aging, and increase longevity. He also provides actionable steps towards getting a better night's sleep every night.

    We all have one, but most of us will never see one. The heart surgeon now has that privilege but, for centuries, the heart was out of reach even for surgeons. So when a surgeon nowadays opens up a ribcage and mends a heart, it remains something of a miracle, even if, to some, it is merely plumbing. As with plumbers, the quality of surgeons’ work varies. As with plumbers, surgeons’ opinion of their own prowess and their own attitude to risk are not always reliable. Measurement is key. We’ve had a century of effective evidence-based medicine. We’ve had barely a decade of thorough monitoring of clinical outcomes. Thanks to the ground-breaking risk modelling of pioneering surgeons like Samer Nashef, we at last know how to judge whether an operation is in a patient’s best interest, which hospital and surgeon would be best for that operation, when it might best be performed and what the exact level of risk is. We have at last made what is important in surgery measurable. But how should surgeons, and their patients, use these newfound insights? Ever since his days as a medical student, Samer Nashef has challenged the medical profession to be more open and more accurate about the success of surgical procedures, for the sake of the patients. In The Naked Surgeon, he unclothes his own profession to demonstrate to his reader (and prospective patient) many revelations, such as the paradox at the heart of the cardiac surgeon’s craft: the more an operation is likely to kill you, the better it is for you. And he does so with absolute clarity, fluency and not a little wit.

    Jen Gunter now delivers the definitive book on vaginal health, answering the questions you've always had but were afraid to ask--or couldn't find the right answers to. She has been called Twitter's resident gynecologist, the Internet's OB/GYN, and one of the fiercest advocates for women's health...and she's here to give you the straight talk on the topics she knows best.Does eating sugar cause yeast infections? Does pubic hair have a function? Should you have a vulvovaginal care regimen?Will your vagina shrivel up if you go without sex?What's the truth about the HPV vaccine?So many important questions, so much convincing, confusing, contradictory misinformation! In this age of click bait, pseudoscience, and celebrity-endorsed products, it's easy to be overwhelmed--whether it's websites, advice from well-meaning friends, uneducated partners, and even healthcare providers. So how do you separate facts from fiction? OB-GYN Jen Gunter, an expert on women's health--and the internet's most popular go-to doc--comes to the rescue with a book that debunks the myths and educates and empowers women. From reproductive health to the impact of antibiotics and probiotics, and the latest trends, including vaginal steaming, vaginal marijuana products, and jade eggs, Gunter takes us on a factual, fun-filled journey. Discover the truth about:- The vaginal microbiome - Genital hygiene, lubricants, and hormone myths and fallacies - How diet impacts vaginal health - Stem cells and the vagina - Cosmetic vaginal surgery - What changes to expect during pregnancy, after childbirth, and through menopause - How medicine fails women by dismissing symptomsPlus: - Thongs vs. lace: the best underwear for vaginal health - How to select a tampon - The full glory of the clitoris and the myth of the G Spot... And so much more. Whether you're a twenty-six-year-old worried that her labia are "uncool" or a sixty-six-year-old dealing with painful sex, this comprehensive guide is sure to become a lifelong trusted resource.

    While the topics are exotic and erotic, the authors handle each one in a sensitive, thorough, analytical, and fascinating way and manage to explain a secret world to those who might wish to visit.