Everyone's a critic: Pigeons can be trained to identify bad art. That's the conclusion of a lone Japanese researcher, who used a panel of adults to judge paintings made by children, then used some of them to train pigeons to peck at good art. The birds were then set loose on a set of unfamiliar paintings, and they still managed to separate the good from the bad. Changing the images to greyscale partly eliminated the effect, leading the author to conclude that both color choice and visual patterns contributed to the pigeons' visual discrimination.
link: Weird science discovers that beer could power our future - Ars Technica
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