To Heal Wounds, Cells Time-Travel Back to a Fetal State

To Heal Wounds, Cells Time-Travel Back to a Fetal State

Instead, the cells of the damaged tissue turn the clock back all the way to a more fetal state, tapping into the proliferative power that once characterized development — and a program thought to have long gone silent.Atom Bombs and Self-Renewing CellsIn the early 1900s, scientists theorized that the specific blood cell types they’d learned to distinguish from one another under a microscope — red blood cells, white blood cells and platelets — came from a common, more primitive source: a stem cell.