Scientists Finally Know Why Tattoo Ink Lasts Even Though Skin Regenerates
If the skin regenerates itself every couple of weeks, then why do tattoos last for years? Sure, we know that tattoo ink is inserted into the layer right beneath the outermost layer of skin, but even the cells there must regenerate eventually. The seeming paradox of tattoo permanence has hurt the brains of even the most science-savvy ink enthusiasts. Fortunately, on Tuesday, a team of researchers report they’ve found a solution.