@maddiemassy: Have you ever seen shimmery rainbows on sliced deli meats? Does that mean that the meat is spoiled and unsafe to eat? Or maybe something else is happening... Refs: Anderson, 2019, ‘Mechanics of structural color’ University of Wisconsin-Madison, 2024, ‘Not Just Red and White: Why Rainbows Appear on Deli Meats’ #sciencefacts #STEM #foodscience #structuredcolour