Researchers at Rice University have uncovered new insights into the evolution of bird behavior, revealing why certain mating ...

The amount of sperm released decreased sharply with each mating during a single day, reducing the males' fertilization rate.

In rare video footage, a male whale shark has been spotted biting at his female partner during courtship. Before now, we knew ...

Men are more prone than women to exhibit sunk cost bias—the tendency to persist with an investment despite its ...

A study reveals a surprising link between upper body strength and mating success across genders. Using data from 4,316 U.S.

Shark sex is a bitey business, with males grasping females with their teeth during the act. The resulting wounds are helping ...

Whale sharks typically gather around Ningaloo Reef every year from March through July to feast on the plankton and krill that ...