Colourful feathers on dinosaurs and their descendants. Sleek, fast, with sharp claws and iridescent feathers, Cassowaries are almost like dinosaurs. How do the cassowaries manage to get that special sheen on their feathers? What gives cassowaries they're menacing iridescence? Long flowing rainbow feathers, all wrapped around a small creature the size of a duck, hardly a terrifying image of a dinosaur. What connects a small duck like dinosaur with a hummingbird? Their iridescent feathers.
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