In many parts of the world, including Africa, seashells served as a widely accepted form of currency for centuries, especially as the barter system proved insufficient for more complex economies.

Seashells and lobster claws are hard to break, but chalk is soft enough to draw on sidewalks. Though all three are made of calcium carbonate crystals, the hard materials include clumps of soft ...

Chalk and seashells are made of the same stuff. So why is one crumbly and the other tough? If you know that seashells are made of basically the same stuff as chalk, you might have wondered why chalk ...

Seashells are one of the most abundant and diverse among nature’s myriad marine resources. They have been valued by man as religious symbols, artifacts and decorative or ornamental objects. Shells are ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Tourists trying to steal hundreds of pebbles and seashells, as well as ...

Seashells come in different shapes, sizes and colours and thousands are washed ashore by the waves. But who do these shells belong to? Marine biologist Alan Deidun enlightens Stephanie Fsadni. ‘She ...