Where do we come from? Where do animals come from? For thousands of years we really had no clue how living things were created -- great thinkers like Aristotle

Never before have the facts of life been presented in such an accessible—or novel—way. Our hero is Willy, a little sperm who lives inside Mr. Browne with 30

Over the past several decades, Richard Ellis has produced a remarkable body of work that has been called "magnificent" (Washington Post Book World), "masterful"

Birkhead reveals a world in which males and females vie with each other as they strive to maximize their reproductive success. Color illustrations.

Sperm Biology represents the first analysis of the evolutionary significance of sperm phenotypes and derived sperm traits and the possible selection pressures r