Outnumbered: Are your bacteria controlling you?

This week, why we're passengers in our own bodies, outnumbered by our resident bacteria. We explore how these bugs can alter your brain and behaviour, and "trans-poo-sion": the poo-transplant process that might save your life! Plus, why the chances of ET existing have rocketed this week, and signs that birds count the same way we do... Like this podcast? Please help us by supporting the Naked Scientists