“The latest research shows that the digestive tract and the central nervous system maintain a complex two-way line of communication via the gut-brain axis.” (And let’s not forget the brain-gut-internet comment section axis). Continuing its Gut Week, FIveThirtyEight reports on how your gut affects your mood.

+ Aeon: Why do so many scientists talk about our mental life as if we were computers? (Maybe they’re hoping there’s still time for a reboot…)