Most marine animals form their shells from calcium carbonate, which is a tough mineral also found in limestone. Some sponges and microorganisms use another compound silica. There is also a group of ...

Every time you pick up a seashell at one of Corpus Christi's beaches, do you realize you're holding a mollusk's abandoned exoskeleton? A seashell is a hard, protective outer layer created by an animal ...

Archaeologists in the United Arab Emirates found hundreds of seashell fragments left from a craft workshop at an ancient desert oasis settlement, a study said. Photo from T. Sagory Waves splash along ...