What do magnets, smartphones and medical imaging devices have in common? They all depend on rare earth elements called lanthanides, which are vital for modern technology. Yet, separating these ...

In ancient Greek mythology, the Titan Prometheus was bound to a rock as punishment for stealing fire from the gods and giving it to humans. The rare radioactive element promethium was named after him ...

A new compound containing one of the rarest elements in the world, promethium, has revealed its mysterious properties for the first time. Promethium only exists naturally in minuscule amounts – ...