Octopuses change color to camouflage themselves from predators such as stingrays and eels. Octopuses have even been observed changing color in their sleep. Octopus's color-changing ability is known as ...

Forbes contributors publish independent expert analyses and insights. GrrlScientist writes about evolution, ecology, behavior and health. You might not realize this, but quickly changing colors, as ...

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A pair of biologists at Walla Walla University, in the U.S., have developed a way to calculate the energy costs for certain types of animals with color-changing abilities. In their study published in ...