Humans see a variety of colors because our eyes have three types of cone cells. But things don’t look quite as vivid for some of our fellow mammals—some see in two colors, others just in black and white. Color vision evolved in primates about 35 million years ago. And in some species like the squirrel monkey, part of the population evolved to see a completely different colored world than the other.
OUR SENSES is generously supported by Dana and Virginia Randt.
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