A new species of mollusc has been discovered at the bottom of a river in Thailand after extreme drought. The creature, a large mussel — only the third known species in its genus — is considered ...

Most marine animals form their shells from calcium carbonate, which is a tough mineral also found in limestone. Some sponges ...

In its temporary home at a laboratory aquarium in China, a river creature began to “dance.” The small animal twisted its shell in circles, sometimes changing direction. Scientists watched the animal.