Octopuses and related animals like cuttlefish have a remarkable ability to change the color of their skin, often for disguise. But their eyes don’t have receptors for color. So it’s been a mystery how cephalopods can even know which colors around them to blend into. Research from the University of California, Berkeley and Harvard suggests an answer to this riddle.
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An attempted rescue of the Green Berets fails when a Black Hawk helicopter takes enemy fire and strikes the side of a mountain.
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