We read The Girl With All The Gifts by M.R. Carey and Annihilation by Jeff VanderMeer, but this episode is so much more - how does your gut control your mind? Are you more bacteria than human? Is science...good? Listen to find out!

Our guests are award-winning science journalist and Director of Content for Science Alert, Fiona MacDonald, and evolutionary- and micro-biologist, Director and CEO of the multi-university Sydney Institute of Marine Science, and Professor of Biology at The University of New South Wales, Professor Peter Steinberg (who is also Alex's dad).

This part is full of spoilers, so watch out!