What's the most expensive element on Earth?

06 July 2015
Presented by Graihagh Jackson.

This week, Graihagh Jackon drilled into John's question to try and find out what the most expensive element in the world is... But first, how do we define 'expensive?' Chemist Mark Lorch set us straight...

Add a comment

This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.