Birds have one of the widest varieties of appearances in all of the Animal Kingdom. With so many species, each offers unique ...

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 ...

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.

Researchers studying copulation in mayflies pulled off a stunt worthy of the naughtiest ancient Greek myths. Just like ...