10 years ago, a simple photograph of a dress sparked a global debate unlike anything seen online before. Posted in 2015, the image caused people to argue intensely over whether the dress ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Blue and black or white and gold? A decade later, it turns out the ultra viral optical illusion dress was also a boon to scientific advancement. See link below The science behind the dress colour illusion Internet The Guardian Gold White Blue Black Dress The Dress: An Interactive Classroom Experiment by Andrew Robinson Precarious Physicist Medium