Monochrome photography is photography where the image produced has a single hue, rather than recording the colors of the object that was photographed. It includes all forms of black-and-white photography, which produce images containing tones of grey ranging from black to white. Other hues besides grey, such as sepia, cyan or brown can also be used in monochrome photography. Monochrome photography is mostly used for artistic reasons in the contemporary world.

https://en.wikipedia.org/wiki/Monochrome_photography

"As a professor of science, I assure you we did, in fact, evolve from filthy monkey-men."
Professor Farnsworth
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