検索キーワード： "セックス" 解剖学・生理学

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.

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.

A human physiology expert lays out the basic facts to explain why the idea of biological sex as a binary is simply wrong Biological sex is as nuanced as gender. Many of us are biologically more typically masculine in some ways and more typically feminine in others. The constellation of traits...

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.

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...

We inherit mechanisms for survival from our primeval past - none so obviously as those involved in reproduction. The hormone testosterone underlies the organization of activation of masculinity: It changes the body and brain to make a male. It is involved not only in sexuality but in driving aggression, competitiveness, risk-taking - all elements that were needed for successful survival and reproduction in the past. But these ancient systems are carried forward into a modern world.

From split-gill mushrooms to duck-billed platypuses, the spectacular science of sexual reproduction and creation of biodiversity on Earth. Let’s talk about sex. Not boring, human sex, but the endlessly fascinating, varied, and complex forms of reproduction in the rest of the natural world...

“Read this book and discover sex again, but from a scientific perspective, and see why it evolved. It’s almost as much fun, and needs less energy.” — Peter Macinnis, author of 100 Discoveries: The Greatest Breakthroughs in History ""How Sex Works manages to inject science writing with...

While we joke that men are from Mars and women are from Venus, our gender differences can't compare to those of other animals. For instance: the male garden spider spontaneously dies after mating with a female more than fifty times his size. Female cichlids must guard their eggs and larvae--even from the hungry appetites of their own partners. And male blanket octopuses employ a copulatory arm longer than their own bodies to mate with females that outweigh them by four orders of magnitude. Why do these gender gulfs exist?