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Dinosaurs died out 65 million years ago. A new discovery gives us a better idea of what they sounded like. Scientists looked at a rare, 78-million-year-old fossil from a dinosaur. The fossil has an image of the dinosaur's voice box. Scientists say the shape of the voice box means it probably made bird-like sounds.
A dinosaur researcher did many tests on the shape of the voice box. He now has an idea of what the voice box muscles looked like. The muscles controlled the sounds. The research means movies like Jurassic Park got it wrong. Tyrannosaurus rex probably made a tweeting sound, like a bird.
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