The ocean glows with undersea life which makes its own light. These animals living on the ocean floor, beyond the reach of sunlight, have evolved this bioluminescence for camouflage, to find mates or to repel or confuse predators. They also have a sort of color vision which combines sensitivity to blue and ultraviolet light. Their detection of these shorter wavelengths may provide them a way to ensure they grab food, not poison. Two new studies published this week in ...
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