For a small number of animals, reproduction marks a biological endpoint rather than a stage in an ongoing life cycle. Death ...

The twins were born to a 22-year-old female named Mafuko, who lost her own mother to armed individuals. The extremely ...

The twins were born to a 22-year-old female named Mafuko, who lost her own mother to armed individuals. The extremely ...

According to WJAR, researchers at the Center for Coastal Studies were conducting a routine survey when they spotted the whale ...

A large-scale analysis of 117 mammal species found that preventing reproduction is associated with longer lifespans, suggesting a strong link between reproductive activity and life expectancy. Why do ...

Meet animals that grow for a lifetime, sometimes for centuries, and discover why dinosaurs did not, despite their huge size.

Find out which animals live the longest and what clues this gives us for potentially slowing down human aging.

It is a wonder-filled, sometimes puzzling, and even shocking world out there in the animal kingdom. One of those kickoff ...

Rolf Benirschke, former San Diego Chargers placekicker, has been elected chairman of the San Diego Zoo Wildlife Alliance.

For 35 years, American zoologist Laurie Marker has been collecting and storing specimens in a cheetah sperm bank in Namibia, ...

A groundbreaking new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions ...

As herds rely on fewer replacement heifers, the stakes for getting each one pregnant at the right time are higher than ever.