Sometimes these elements are unwanted ... Cast iron contains high levels of carbon, which makes it a hard, brittle metal. Cast iron was commonly used throughout Europe to make church bells ...

Can an iron structure stand tall for 1,600 years without rusting, despite being exposed to the elements ... harm associated with processes like metal extraction,” she tells CNN.

Iron is an element. It is made of only one ... Gold is an example of a metal element that can also be found in rocks. The air we breathe is mostly made from nitrogen and oxygen, both of which ...