Wondered what people thought of this hypothesis.
I remember years ago I read something somewhere about ancestors of humans living in water and this helped with our evolution.
I think of it now and again, but until now didn't know what the theory was called or anything.
I did a search and managed to find the name of the hypothesis I was thinking of - Aquatic ape hyopthesis.
Seems interesting. If it were true it would mean that water was not only a major factor in evolution of life in general but for human evolution too.