> Why didn't sharks evolve?
Sharks *did* evolve, and continue to do so. The species fo sharsk alive today are not the same as the species of sharks alive 30 million years ago. The body forms remain similar because the form is emminantly suited for the role of fast predator... there is little room for improvement there.
> We cannot do that, nor have we seen that to happen in nature during the recorded history of man.
Wrong. Do some research.
A shark is a shark is a shark. Sharks did not turn into baboons. A shark of today is far more similar to a shark of several millions of years ago than it is different. What different species did the prehistoric shark evolve into?
Stop telling me to do research. This is your theory, therefore YOU have to back it up.