Older mice that received a faecal microbiome transplant from younger animals went on to have improved brain plasticity, which meant their brains could overcome a neurological condition that is typically successfully treated only in childhood
Source: [New Scientist](https://www.newscientist.com/article/2531241-faecal-transplant-makes-the-brains-of-old-mice-act-young-again/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home)