Onassis, a giant Amazon River turtle, has lived at the zoo since 1969. No one knows exactly how old she is, but she's still curious and healthy.

Research reveals how dams both hinder native fish migration and help control invasive species. Studies track fish movement ...

Many of the fish we eat play a key role in maintaining the seabed—and therefore our climate, new research shows. Convex ...

A controversial idea suggests the ancestors of echidnas were more like the platypus. For the first time, fossil evidence ...

While many of those species are found in places like Africa, South America and Asia, there are those in North America, as ...

Research led by the Spanish Institute of Oceanography (IEO-CSIC), with the participation of the Universitat Autònoma de ...