Few harbingers of old age are clearer than the sight of gray hair. Although this may seem like a permanent change, new research reveals that the graying process can be undone—at least temporarily. Hints that gray hairs could spontaneously regain color have existed as isolated case studies within the scientific literature for decades. This signaled a reversal in the normal graying process, which begins at the root. Those individuals provided both single- and two-colored hair strands from different parts of the body, including the scalp, face and pubic area.