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 ...

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.

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 ...

Curious Kids is a series for children. If you have a question you’d like an expert to answer, send it to curiouskids@theconversation.edu.au You might also like the podcast Imagine This, a ...

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 ...

Seashells offer low-carbon concrete breakthrough in new study. It’s a simple idea with real potential to reshape part of the sector. Discarded seashells, typically treated as waste, can be transformed ...