Sorry, wasn't clear. Meant square footage wise, not cubic footage wise. My bad for not being clearer.
I am not a genetic scientist, but I do know that not all remains carry usable DNA. You see that even in forensic criminal science. If a body is found that has been in a state of decay for a while, they often have to extract DNA from several points to find some that can be accurately tested. And that is after a few years in comparison to many thousands of years that fossil remains of earlier man have been subjected to nature's decaying forces.
Let me make clear again, in case you might have forgotten my position on this, I am NOT saying that evolution (as defined) is not a real force in nature. I AM saying, that from a purely scientific viewpoint, the evidence to support the theory is VERY thin and shaky.
I do think (I dare say "know") that genetic mutations take place and that in some species, there is more evidence of some genetic alterations that are passed down to subsequent generations. For evolution to be true (as defined) this would have to be true as well. Like why Darwin's hypothesis was accepted and Lamarke's hypothesis was rejected.