One of the largest reasons why atheists and evolutionists deny the scientifically valid proposition of creation is that it cannot be disproved. If one accepts a literal translation of Genesis, then you can disprove Creation. If you can prove that any organism is greater than 6,000 (roughly) years old; then a literal interpretation of Genesis can be proven false. You are probably saying that I'm asking for something ridiculous. Nope. We can date trees back. In fact, the oldest living organism (according to Google) known to man is 5,100 years old.
This is at least as good as evolution; which can be disproven if you happen to find a rabbit buried with a dinosaur. Which is perhaps impossible, irregardless. While they existed at the same time, they may just never have been buried together. Besides, we already know that Evolutionists would merely shift their theory to allow rabbits in their delusional world before time. Evolution once denied mammals and dinosaurs at the same time, now dinosaurs exist with "basic" mammals. Convergent evolution is another example of the shifting theory of Evolution, and no mountain of evidence could disprove it.
Let's imagine they dig up a dinosaur with human bones in it's stomach. Evolutionists would no doubt insist it was buried later. Or they might claim that humans evolved in their "land before time". Perhaps even a race of man just like our own, but yet, unrelated to us.