Forget the 'dress’ illusion, there’s a new trick that can make you see black and white as green and red for up to three and a half months. The McCollogh effect was discovered by an American ...

The site “ stuff white people do ” excavates an Internet comment about Barack Obama: “I don’t care if he’s black, white, yellow, red, brown, or purple with green spots.

The McCollough effect was found by a psychologist in Canada in 1965, and explained by Tom Scott in a video on YouTube (shown). It involves staring at a black and white test image for up to a ...

You see them a lot in West Africa, and those are based on the Ethiopian flag. Green, red, white and black are the four colors of Islam, so you see those a lot in Northern Africa.” ...

The banner, with its horizontal red, black and green stripes, was adopted by the Universal Negro Improvement Association (UNIA) at a conference in New York City in 1920.

Richard Pelham / Getty Images "Green, yellow and black are much more popular in Africa. That may be an anti-colonial reaction to the red, white, and blue of the colonial powers," Kaye says.