Clay is found usually where water once was like a dried-up stream. It has been used for building and making things for thousands of years. It can be made hard by placing it in a special hot oven ...

It's the latest technology being used to create sustainable building materials ... In ETH Zurich's development, a machine ...

Workers digging a well outside the city of Xi'an, China, in 1974 struck upon one of the greatest archaeological discoveries in the world: a life-size clay soldier poised for battle. The diggers ...