Whether pterosaurs are capable of powered flight?

Whether pterosaurs are capable of powered flight is the focus of the writer and professor, in three aspects, including fossils, the structure of bodies, and the method of gaining speed have been elaborated. The professor, however, states that it’s possible that pterosaurs are capable of powered flight.

As opposed to the writer’s idea that pterosaurs are cold-blooded, they have a slow metabolism which can’t support them to fly, the professor states that scientists have discovered in fossils that some pterosaurs were covered by hair, which is features of warm-blooded animals. She advances the theory by saying that if pterosaurs are warm-blooded, they can get enough energy from metabolism.

The professor continues to discredit the writer’s assertion that pterosaurs are too heavy to have a flight, by examining the fact that pterosaurs have special body structures to decrease their weight. In detail, she points out that pterosaurs’ bones are hollow, which largely decreases their weight, and once they weight like birds, they are possible to fly.

It is the professor’s third argument that pterosaurs use all four legs’ muscles to get the energy to launch, which contradicts the view of the writer that pterosaurs only use back leg muscles to get the power which is too small and weak to support them have a flight. To explore further, she contends that pterosaurs use all four legs to push themselves into the air, it can be faster and more powerful.

Therefore, the three topics in the writing are not convincing.