Ruairi Robertson explains how new research is proving the connection between our intestines and our brains.
Robertson says we are more bacteria than we are human. Some gut bacteria protects us from illness, whereas others make us sick. Killing microbes has contributed to a lot of possible problems in early and late stages of life.
Important words to remember: vagus nerve, neurons, serotonin.
After you watch this talk you will understand the meaning of "gut feeling", " butterflies in your stomach".