Females with more potential mates can produce offspring with fewer harmful mutations, helping populations become more ...

Endangered leopard sharks have been observed mating in the wild for the first time, with scientists witnessing a “threesome” involving two males and a female. The encounter was filmed by Hugo Lassauce ...

In examining the mating rituals of roundworms, researchers uncovered a unique approach to reproduction that maximizes genetic fitness. Sparks fly when a female nematode meets her mate in a Petri dish.

A provocative study by evolutionary biologists takes on one of Charles Darwin’s central ideas: that males adapt and compete for the attention of females because it is the females who ultimately choose ...