A scanning electron micrograph of the intestinal lining of a mouse, with several bacteria (green) and one red blood cell (red) CJC Copyright: IKELOS GmbH/Dr. Christopher B. Jackson/Science Photo Library A faecal microbiome transplant (FMT) could make an aged brain as adaptable as a young one. Our gut microbiome has been linked to our risk of depression and may even play a role in shaping our personality. But for the first time, a study has shown…