Last week, biologists published a paper suggesting that monkeys could pass the mirror test. This is a classic test given to animals to measure the amount of self-awareness they have. Show a cat or a dog — or a 1-year-old human, for that matter — a mirror, and the animal won’t know that it is looking at a reflection of itself. Chimps, on the other hand, and older children, understand that they are seeing their own image. Read more →

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