The deep sea is a dark, cold place. It's just a few degrees above freezing, subject to immense pressure, and beyond the reach ...

New research shows that the earliest sponges were soft bodied and lacked skeletons, explaining why their oldest fossils are ...

Researchers have uncovered something extraordinary: starfish don't have five arms. They are, genetically, one massive, ...

The scientists examined the lineages of two groups of bivalves—marine invertebrates that include clams, oysters, mussels, and ...