This element is one of many first made at UC Berkeley in the 1950s. Unlike most manufactured elements, though, this one is actually useful. This is how it starts up nuclear reactions. Researchers ...

Actinides are a group of heavy, radioactive elements that include uranium, plutonium, americium, curium, berkelium and ...

Radioactive californium-252 is a prolific neutron emitter, making it useful for examining jet engine parts for defects, finding underground oil and gas reservoirs, bombarding certain tumors, and ...

Storing radioactive waste poses a problem for nuclear power facilities worldwide and often leads to heated debates over the pitfalls of nuclear energy production. Pictured, environmental activists ...

A little-known element called californium is making big waves in how scientists look at the periodic table. According to new research californium is what's known to be a transitional element, meaning ...