Diatomaceous earth is a naturally occurring sand extracted from the earth. It consists of microscopic skeletons of algae ... diatomaceous earth are largely made up of a chemical compound called ...

Discovery in China of tools called Quina scrapers suggests the people of East Asia were as inventive and flexible with ...

This strange white paste might not look like much, but it might help solve the sand shortage, while making the cement manufacturing process capture carbon dioxide instead of emitting it.

In the barn, under newspapers, behind the Case tractor, were dozens of boxes, some contents strewn across the cement floor: ...