Giant otters are often mistaken for harmless river mammals, but in reality they are highly aggressive predators capable of confronting animals built to kill. Working as coordinated family groups, they ...

Crocodiles are among the most powerful reptilian predators on Earth, and none grow larger than the saltwater crocodile. Towering over Nile crocodiles and alligator species in both length and weight, ...

Could Spinosaurus swim? A new fossil with a scimitar-like head crest provides new evidence on the unsettled question.