Wow. You knew birds are dinosaurs. Did you also

Wow. You knew birds are dinosaurs. Did you also know there were fire belching, flying dinosaurs? True. Part of the digestive process, of these dinosaurs, was to develope hydrogen gas, used mainly to support flying. In times of distress though they were able to implement a catalyst to combust the hydrogen and hence fire. No caveman would have ever seen this though inc Lucy.