Interstellar space should be filled with gaseous iron. But until now, astronomers couldn't find it.
All matter is composed of fundamental substances called elements. Depending on the combination of elements, the result is a different material, with different characteristics. And while some elements are naturally occurring, others are only now being realized as they are created inside particle accelerators. Here are all the latest discoveries and developments to help you keep up with the fascinating world of elements.
Our world is full of chemicals that shouldn't exist. New research could explain why they exist anyway.
The world's oldest classroom poster of the periodic table of elements, dating to 1885, has turned up in Scotland.
Polonium was a critical ingredient in the first atomic bomb and it's a suspected poison in more than one high-profile death.
Diamonds are forever, and gold is precious, but which is rarer? And does that rarity have anything to do with the price we see at a jewelry store?