What's the most expensive element on Earth? - a podcast by Dr Chris Smith

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... Like this podcast? Please help us by supporting the Naked Scientists

Further episodes of Question of the Week, from the Naked Scientists

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Website of Dr Chris Smith