Venkatesh Rao@vgr·Jul 21, 2018I have like 3x more grey hair on the right side of my head than left. I think hair graying is some sort of decentralized system.mentalfloss.com10 Head-Scratching Facts About Gray HairWhether it’s no big deal or a perplexing affront to your vanity, gray hair is a fact of life—and still a bit of a mystery.25