The following is an excerpt from The End of Sex and the Future of Human Reproduction by Henry T. Greely. This is a book about the future of our species, about the likely development of revolutionary ...

In the last 50 years, average human sperm concentrations dropped by 51.6 percent, and total sperm counts dropped by 62.3 percent, according to a study published last week in the journal Human ...

A study based on a review of genetic and health information from more than 276,000 people finds strong support for a decades-old evolutionary theory that sought to explain aging and senescence. A ...

THE author of this book is an American pro fessor of zoology, and from his preface we learn that a large proportion of the population (of the United States?) refuse to accept religious guidance in ...