A new study reveals that behavioral isolation between populations of Bahamas mosquitofish is driven primarily by the actions of females—not just through mating choice behaviors, but also through ...

The cellular biology of reproduction is often depicted as an epic journey, in which millions of intrepid sperm fight to be the first to claim the ultimate prize: the chance to fertilize the egg, which ...

I’m sure that many men throughout the ages have been and will continue to be perplexed by women’s preference for one man over the other, especially if they are this other man. Biologists have been ...

A study of how female lark buntings choose their mates, published this week in Science, adds a surprising new twist to the evolutionary theory of sexual selection. Researchers at the University of ...

New animal research shows female treefrogs may not get the mate they likely want in crowded environments, and those conditions may hamper evolution Female treefrogs prefer a mate with an impressive ...