Do you have a favorite chemical element? Neurologist Oliver Sacks did—he was partial to dense, high melting-point metals, especially those metals between hafnium and platinum on the periodic table. This month marks the 150th anniversary of chemist Dmitri Mendeleev’s design for the periodic table—and we didn’t want to miss out on the party. In this special podcast, we revisit Sacks’ fascination with the elements, and Ira opens up the Science Friday vaults to share two tales of chemical discovery and creation. First, we take a trip back to 2004 for a chat with nuclear chemist Joshua Patin of a scientific team responsible for the creation of two new chemical elements (elements 113 and 115). Then, a voyage to 2010, for a conversation with the late Nobel laureate and buckyball co-discoverer Sir Harry Kroto. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

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“What did the council decide on item 42?” — answered with the speaker and the moment.