Over the past 500 million years, different single-celled organisms in the oceans have discovered at different times and also under very different conditions how to build a 'shell' around their single ...

Eggshells are more than kitchen waste. Learn seven practical gardening hacks that use crushed shells to enrich soil, protect ...

A chicken eggshell has a tricky job: It must protect a developing chick, but then ultimately let the chick break free. The secret to its success lies in its complex nanostructure — and how that ...

Scientists have discovered a spongy form of calcium carbonate (CaCO3), a material found in limestone, chalk, marble, and the shells of mussels and other shellfish. While most forms of calcium ...