posted on Apr, 10 2007 @ 09:27 PM
First question to ask in terms of evolution is "why?" Animals do not simply evolve out of convienence, there has to be some reason for evolution.
What advantage would a land bound shark have competing against some of the larger predators of the past.
Second Question, Where is the fossil record? If they existed there would be bones to prove it...
Third Question Where would such a creature exist in an ecosystem?
Answering these three questions should bring you closer to a truth...