Clams are a bivalve mollusk, which means they have two shells that open and close via a hinge. Most clams will have their shells shut tightly, but if any of them are open, give them a tap.

Filter-feeding mollusks respond to water pollution in ... And in order to perform that task, they have to open their shells. However, the presence of pollutants in the water affects the manner ...

Sponsor Message These seemingly healthy creatures include a clam-like mollusc called a heart cockle — the name coming from the shape of its shell. "These strange little clams are a little bit ...

Evolution by natural selection can help explain why shells became widespread among mollusks, but it cannot fully elucidate how an individual creature builds a skeleton as exquisite as, say ...