Halalaimus is a microscopic nematode genus commonly found in sediment on the seafloor. It lives 1–5 cm below the sediment ...

Ivory gulls sometimes breed on mountainous Arctic peaks, known as nunataks. These all-white gulls, perfectly camouflaged to ...

Mosasaurs, giant marine reptiles that existed more than 66 million years ago, lived not only in the sea but also in rivers. This is shown by new research based on analyses of a mosasaur tooth found in ...

A surprising fossil find shows that some mosasaurs lived in ancient rivers as oceans changed near the end of the Cretaceous.

Cephalopods—the class of animals that comprises octopuses and squids—are ubiquitous throughout the ocean, including in the deep sea. However, researchers still don't know very much about the ...

Mosasaurs, giant marine reptiles that existed more than 66 million years ago, lived not only in the sea but also in rivers. This is shown by new research based on analyses of a mosasaur tooth found in ...

Few complete skeletons remain of this gentle behemoth, who was destroyed by explorers and fur traders in the Arctic. Illustration of the extinct Steller's Sea Cow (Hydrodamalis gigas), a sirenian that ...