A tool forged to read the mineral whispers of Mars has turned its gaze homeward, illuminating ancient human marks on stone that time had nearly erased. By manipulating the color channels of satellite imagery — a method NASA engineers designed to distinguish geological layers on another planet — researchers have made petroglyphs and pictographs invisible for millennia suddenly legible again. The discovery speaks to something enduring about human ingenuity: that the instruments we build to reach outward into the unknown often help us recover what we have lost within ourselves.