At this very minute, microorganisms in your gut are impacting your how you think and behave. Think about that before blaming others for being on your nerves.

Bowel health. Probiotics. Faecal transplants; Gut health is certainly not the sexy side of medicine, but it is an increasingly important one, impacting everything from your allergies to obesity.

Sarah Schenck and Steven Lawrence produced the documentary The Invisible Extinction to explore the current research around microbiomes.