A global study found that large animals consume far more ecosystem energy than expected, challenging long-standing ecological theories.

Modern mammals are known for their big brains. But new analyses of mammal skulls from creatures that lived shortly after the dinosaur mass extinction show that those brains weren’t always a foregone ...

Preventing the extinction of gorillas, rhinoceroses, elephants, lions, tigers, wolves, bears and the world's other largest mammals will require bold political action and financial commitments from ...

Big animals are scary. But what if they were even bigger? Sharks the size of ships, apes that could scale buildings, rats of unusual size - not only are they frightening to think about, they were once ...

Santiago, an 11-year-old mountain lion, used his claws on the fencing to draw himself up to nearly 6-feet tall, eliciting oohs from a group visiting the new habitat for large mammals soon to open at ...

(Corrects spelling of Nuttall throughout) * African game reserves failing to protect animals * Parks' big mammals 59 percent down since 1970 ABIDJAN, July 13 (Reuters) - Africa's game parks have lost ...