Baylor University marine biologist Sarah Kienle, Ph.D., has always been fascinated by leopard seals. These prehistoric, reptilian-looking seals are often portrayed as scary villains in movies such as ...

Typical behavior of leopard seal vocalizations—the male will sing a sequence of sounds underwater before returning to the surface to breathe (represented by a "Z") and repeats this cycle for hours at ...

The combination of the extreme climate in Antarctica, the species' solitary habits and their lethal reputation makes leopard seals one of the most difficult top predators to study on Earth. Marine ...