Eleven years ago, a single photo posted on Tumblr sparked one of the biggest internet debates of all time. The dress instantly divided the world, some swore it was white and gold, What color is the dress? Why do some people see blue and black and some people see gold and white when looking at a single image of a dress? : r askscience The Science Ball Where Everybody Wore the Same Dress Scientific American The Science of Why No One Agrees on the Color of This Dress WIRED