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

Midwinter marks the annual return of humpback whales to Hawaiʻi, swimming down from Alaska to breed in the warmer waters. Tiger sharks start showing up in greater numbers soon thereafter from across ...

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 ...

In the icy waters of Alaska's Bristol Bay, a new study reveals how a small population of beluga whales (Delphinapterus leucas ...

A world of increased heat from climate change means that “entire generations of sexually reproducing reptiles will be ...

Coyotes mate for life, mourn their dead, and even help forests grow, revealing deep emotional lives and vital roles in wild ...

“Tiger sharks typically roam widely in what can seem like random patterns, so finding such a strong and consistent seasonal ...

Every winter, about 10,000 elephant seals make their way to California’s Año Nuevo State Park, to fight, mate and give birth.

In truth, it is not a paradox. The animals involved all seem perfectly eager participants in heterosexual behaviour, as well, so their reproduction is not compromised. It is, though, a puzzle—for ...

Recent research indicates that female gorillas can, and often do, overpower males twice their size, especially in non-alpha ...

Finding a mate is hard in the animal kingdom! As these strangest animal mating rituals show, it sometimes gets even more ...

Chimpanzees and bonobos are among the closest relatives of humans. They share more than 98% of our DNA. Yet, these primates ...