American Indigenous tribes used shells for decorative and ceremonial purposes. On the East Coast, the Wampanoag created elaborate belts of white and purple beads that were carved from hard-shelled ...

Ukraine said it's recalling a batch of 120mm artillery shells, typically used as mortar rounds, as it seeks to boost its ammo ...

The recent shells retain the organic material that give the shells their color and nacreous sheen. Nacre (mother of pearl) is an elaborate combination of aragonite, calcite, and protein. When the ...