Exactly! That's what I wanted to hear from you about the rare case of human who can dive into the water and hold breadth for a longer time as compared to others. This shows that there is probability we can achieve this acqatic life as well along with the terrestrial life. But it will require lot of research to study about the features of human body and reptile. In case we find a way to live in water as well, it would be a marvelous achievement of us "we human". Then only one thing will be left for us to achieve i.e. to fly..!!!. How amazing it would be if we could have possessed all these three lifestyles together :Water , Land and Air .. Everyone would have enjoyed their lives according to their choices. At any moment of time we would fly, dive inside the water and swim and enjoyed living on dry land too.....:):) But again a lot of research and findings would be needed for this to happen with full dedication....:)