It's a kind of voice box, but it's different from the larynx, which is found in many animals, including crocodiles and humans. But where their voice box is located is deep in the chest where the windpipe branches into two tubes, if you will, that go to the right and left lung." How do we know what dinosaurs sounded like? In 2013, they discovered this fossil has the oldest known representation of a voice box ever discovered. It's a combination of evolutionary history and anatomy that allows the researchers to determine just what the avian dinosaurs sounded like.

Source: CBC News October 13, 2016 20:31 UTC