A new species of tusk shell, a burrowing marine mollusk, has been discovered in deep, North Atlantic waters by scientists from the British Antarctic Survey and the Senckenberg Society for Nature ...

Dentalium shells, smooth tusk-like mollusks from the Pacific, were highly prized by Native American tribes for generations.

For generations, Native Americans prized dentalium or tusk shells as currency, status symbols and sacred objects. Harvested in the Pacific, they were traded thousands of miles inland, held real value ...

The bead was made from a tusk shell cut into a ring. It was about 1.3 centimeters long and is believed to be from the late Paleolithic Period about 23,000 years ago. Researchers further examined ...