Why Some Cold Cuts Make Iridescent Meat Rainbows—And Why They’re Still OK To Eat

Have you ever turned over a slice of roast beef and caught that glimmer? A hint of rainbow iridescence that’s a little otherworldly for what’s an otherwise run-of-the-mill cold cut? Even when fresh, some sliced meats give off a metallic sheen that can give you pause. But what you’re seeing is the common optical phenomenon […]

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