In episode 179 Jo welcomes back Dr Kathryn Harkup, who trained as a chemist and now writes about and communicates science stories. She talks to Jo about her recent book 'The Secret Lives of Molecules', including coffee, tea, naps and how to avoid zombies!  Jo also welcomes back Dr Jamie Gallagher, who is a science communicator, public engagement trainer and chemist. He returns to share another story from the Periodic Table, and this time it's an element that's essential to the human body but also takes us to the Moon.      Presented, produced & edited by Jo Durrant. Music licensed from Purple Planet.

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