Can your emotions 🧠 cause stomach problems?

It all began with a simple fishing experiment.

In 1822 a soldier in the US army was shot in the stomach. With care from the army doctor, the tissue around the wound healed - but it didn’t heal over, leaving an inch-wide opening.

The army doctor saw this as a unique opportunity for science, with a window straight into the gut.

Photo by British Library on Unsplash

In exchange for a place to sleep and a small income, the army doctor started performing scientific experiments on the man’s gut.

He would...