“Scientists have successfully reversed neural birth defects in mice whose mothers were given heroin during pregnancy… they induced the brain’s own cells to carry out extensive repairs.” -Jocelyn Rice
What this isn’t: this is not medicine that can be used now. It is not something that has even begun being tested on humans.
What is it: an indication that stem cells are valuable as chaperones — guiding other cells to fix damage and maintain tissue properly — rather than is the actual mechanics fixing damage.
That’s very exciting!