Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, ...

For the first time, we know more than we ever expected to know about the sex lives of the majestic beluga whale. It's ...

Ducks evolved reverse spirals and sperm storage that give females surprising control, challenging long-held assumptions about ...

Among marine mammals, beluga whales ( Delphinapterus leucas) are particularly difficult to study in their icy habitat. To better understand and protect this endangered species, scientists must piece ...

Four aquariums worked together to relocate two sand tiger sharks from the NC Aquarium at Fort Fisher to larger habitats at ...