Ten years ago, a photo of a dress posted on Tumblr sparked a massive debate: was it blue and black or white and gold? Millions argued online, and even celebrities joined in. Scientists later explained The Dress: A Black and Blue Debate Over the Color of a Dress Stirs Social Media WSJ Is the dress blue black or white gold? Body Worlds Amsterdam The dress was a viral online phenomenon in 2015, centered on a photograph of a dress that people disagreed on whether it was blue and black or white and gold. Within a