Sperm quality in the Western world has decreased by almost 60 percent in less than 40 years. More and more couples are involuntarily childless or struggle to have children. Fertility is declining worldwide. Fine, you might think. There's already too many of us. But the problem is that men with poor sperm also have shorter lives, and suffer more illness and health problems than other men. An equally serious problem is that it doesn't just affect people. The same tendency is being seen among fish, amphibians, insects, birds, reptiles and mammals. What's to blame for this decline in reproductivity, is there anything we can do to reverse the trend? Will it simply lead to the extinction of humanity and other forms of life? In this exciting and horribly well-timed fact-book, Niels Christian Geelmuyden shines the spotlight on the current research being done in this field. It's a book that concerns you, and your children and grandchildren, in a way few other books can claim to.