Resultados para "Sex" en Ciencia

Este libro descubre la más sucia, sorprendente y festiva intimidad de los seres vivos. Ahí fuera se vive una orgía permanente en la que los chimpancés disfrutan de sus penes con espinas y los patos, de sus enormes sacacorchos; donde los pájaros se ponen los cuernos sin remordimiento alguno y las ranas se hacen las muertas para escapar de los pretendientes más insistentes; en el que los hongos tienen tres, cuatro o hasta miles de sexos, algunos peces cambian de sexo y otros llevan los genitales de sus examantes pegados a sus escamas; donde los zánganos eyaculan tan fuerte que revientan.

In this fascinating and thought-provoking book, author Nick Lane brings together the latest research findings in the exciting field of mitochondria research to reveal how our growing understanding of mitochondria is shedding light on how complex life evolved, why sex arose (why don't we just bud?), and why we age and die. This understanding is of fundamental importance, both in understanding how we and all other complex life came to be, but also in order to be able to control our own illnesses, and delay our degeneration and death.

There is no one better qualified than Jared Diamond - renowned expert in the fields of physiology and evolutionary biology and award-winning author - to explain the evolutionary forces that operated on our ancestors to make us sexually different. With wit and a wealth of fascinating examples, he explains how our sexuality has been as crucial as our large brains and upright posture in our rise to human status.

Being human entails an astonishingly complex interplay of biology and culture, and while there are important differences between women and men, there is a lot more variation and overlap than we may realize. Sex Is a Spectrum offers a bold new paradigm for understanding the biology of sex, drawing on the latest science to explain why the binary view of the sexes is fundamentally flawed.

Sex, Time, and Power offers a tantalizing answer to an age-old question: Why did big-brained Homo sapiens suddenly emerge some 150,000 years ago? The key, according to Shlain, is female sexuality. Drawing on an awesome breadth of research, he shows how, long ago, the narrowness of the newly bipedal human female's pelvis and the increasing size of infants' heads precipitated a crisis for the species. Natural selection allowed for reconfiguration of hormonal cycles, entraining women with the periodicity of the moon - and imbuing women with the concept of time.

Sex, after hunger, may be the most powerful motivating force in our lives. It drives us to seek intimate contact with others and to form relationships that may be fleeting or lifelong, blissful or troubled. Yet many mysteries surround sex and sexuality: Why don't we reproduce by virgin birth? Why does so much of our sexual behavior have nothing to do with reproduction? Why isn't everyone heterosexual? How does the brain create sexual arousal? How do sexual kinks develop? Is porn harmful? What is the relationship between sex and love?

With acuity, humor, and respect for human diversity, The Shortest History of Sex reveals where the many facets of our sexuality—chemical, anatomical, behavioral, social—come from. Chasing down our evolutionary family tree, from the first aquatic creatures to primate societies, David Baker sheds light on our baffling array of passions, impulses, and fetishes, and guides us toward a clear understanding of one of the deepest, most abiding forces of human nature.

Just as humans procreate, animals have their own way of getting it on, too! Some ways are quite unexpected, from the cannibalistic mating practices of the praying mantis to the complicated sex life for snails with backwards organs.

Sex - it's not just for humans! Dive into this wacky but scientific exploration of all things sex. Get answers to all of the random questions you might never have thought to ask yourself.

In The Molecule of More: How a Single Chemical in Your Brain Drives Love, Sex, and Creativity—and will Determine the Fate of the Human Race, George Washington University professor and psychiatrist Daniel Z. Lieberman, MD, and Georgetown University lecturer Michael E. Long present a potentially life-changing proposal: Much of human life has an unconsidered component that explains an array of behaviors previously thought to be unrelated, including why winners cheat, why geniuses often suffer with mental illness, why nearly all diets fail, and more.

Between what can be learned from evolutionary psychology and cognitive science a picture emerges. In Sex, Murder, and the Meaning of Life, social psychologist Douglas Kenrick fuses these two fields to create a coherent story of human nature. In his analysis, many ingrained, apparently irrational behaviors—one-night stands, prejudice, conspicuous consumption, even art and religious devotion—are quite explicable and (when desired) avoidable.

Vital research is starting to challenge long-standing assumptions about gender identity and biological sex, such as work that indicates the brain is a “mosaic” of traits rather than a “male” and “female” brain. Growing knowledge of the genetic complexities of sexual determination is changing the way the medical community treats intersex individuals, and in this audiobook, The New Science of Sex and Gender, we not only examine the latest studies in biology, medicine, and psychology but also, more importantly, their bearing on healthcare, identity, and access.

For almost 40 years, How to Choose the Sex of Your Baby has been the standard reference for couples trying to increase their chances of having the son or daughter they hope for. In this new edition of their classic book, Dr. Shettles and David Rorvik provide authoritative scientific studies and compelling anecdotal evidence demonstrating that the Shettles method continues to produce results unmatched by any other method. Dozens of testimonials confirm its ease of use and rate of success.

First published in 1871, The Descent of Man, and Selection in Relation to Sex sees Darwin apply his evolutionary theory to the human race, controversially placing apes in our family tree. The book covers a range of adjacent themes, including differences between different peoples, the dominance of women in mate choice, and the relevance of evolutionary theory to general society.

In The Other Big Bang, the evolutionary and developmental biologist Eric S. Haag explores the two-billion-year history of sex, from the first organisms on Earth to contemporary humans.

The story of evolution as you’ve never heard it before. What’s the easiest way to tell species apart? Check their genitals. Researching private parts was long considered taboo, but scientists are now beginning to understand that the wild diversity of sex organs across species can tell us a lot about evolution. Menno Schilthuizen invites listeners to join him as he uncovers the ways the shapes and functions of genitalia have been molded by complex Darwinian struggles.

Hormones are chemicals secreted into the blood from glands, such as the pituitary and adrenal glands. They work as part of a complex network, referred to as the endocrine system. The endocrine and nervous systems work together to form the control systems of the body. A balanced hormonal system is able to correctly govern growth, sleep cycle, mood, immune system, metabolism, hunger, sexual arousal, and fertility, among other things. Hormones prepare your body for both immediate and long-term changes.

Thad Roberts, a fellow in a prestigious NASA program had an idea—a romantic, albeit crazy, idea. He wanted to give his girlfriend the moon. Literally. Thad convinced his girlfriend and another female accomplice, both NASA interns, to break into an impregnable laboratory at NASA—past...

A powerful new cultural history of sex written by one of the UK's most prominent historians. Sex, for the entirety of human history, has never been about reproduction. Statistically speaking, only one out of every one thousand sexual acts between a man and a woman will result in a pregnancy. And...

Written in a brilliantly engaging style by biologist Jules Howard, this fascinating and highly engaging work covers the how and why of sex on Earth, in all its diversity. From sperm wars to cuckoldry, hermaphrodites and virgin births, spent males, racy harems, clitoral births, hips, breasts and birdsong, penis-percussion, and those riskiest and most elusive of all traits, monogamy and true love, all this and more is discussed in Sex on Earth, as Jules takes us on a voyage of discovery of the ins and outs of animal reproduction.