Alfred Stieglitz, who has the hairiest ears and the most positive opinions of any dealer in New York, opened his autumn season fortnight ago with an exhibition by that darling of the cognoscenti, John ...

From birth, Neil Harbisson lacked the ability to perceive color. Because of a rare condition called achromatopsia—total color-blindness—he always lived in a black-and-white world. But with the help of ...