Found this at TowleRoad. Check out the link, too.
Scientists in New York have developed a paper-thin material that absorbs 99.955 percent of the light that hits it, making it the darkest substance ever made. The Washington Post reports: “The material, made of hollow fibers, is a Roach Motel for photons—light checks in, but it never checks out. By voraciously sucking up all surrounding illumination, it can give those who gaze on it a dizzying sensation of nothingness.”