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Look into a tank of male guppies and something becomes immediately obvious: almost no two fish look alike. Orange spots, black bars, iridescent flecks of blue — the variation is extraordinary, and ...

A properly dressed male guppy, with its gaudy blue spots and brilliant splashes of orange, can't help but stand out. But for a fish that spends its life swimming among predators, it seems that good ...

From our perspective, guppies lead simple lives—eating, reproducing, and, after a couple of years, dying. Apply a little evolutionary pressure, though, and they can evolve larger brains that make them ...

Add Yahoo as a preferred source to see more of our stories on Google. Male guppies have an extraordinary diversity of colors. They found that the more colorful males were up to two times more sexually ...