Beyond some point, make the amount of time you;re talking about short enough, and you're clearly no longer talking about evolution at all; you're talking about re-engineering and design changes such as we see from Detroit every year.
An examination of recent evidence involving dinosaurs indicates that the millions of years and tens of millions of years we've been reading about all our lives which supposedly separate our own age from the age of dinosaurs is a bunch of BS.
Readers may do their own google search on "Ica Stones" or check out this link. As I see it, despite the fact of locals producing the things once they discovered that gringos would pay for them, there's basically no possibility that the originals were all fakes.
There is no possibility that the state park systems of Utah and Ontario are both perpetrating the same fraud on the public without even realizing they are doing so. The basic reality is that Indian ancestors dealt with dinosaurs on a regular basis a few thousand or a few tens of thousands of years ago, and not 70 million years ago. Vine DeLoria in particular has no use for Christianity or any other form of western religion, making this line of evidence pretty much immune from being written off as Christian propaganda. Indian legends and oral traditions describe the stegosaur as having red fur and the characteristic saw-blade back and "great spiked tail" which it used as a weapon. The petroglyphs we find around lakes and rivers are warnings, meaning "One of these lives here, be careful"
In fact, aside from the one or two accurate depictions of Mishipishu such as at Agawa Rock, there are other more symbolic pictographs, and yet they all show the dorsal spines of the stegosaur:
Once you realize that the time span separating Ancient Greece, say, from the age of dinosaurs is no more than a couple of times that separating us from Plato and Socrates, then you have to ask yourself a question. Evolution amounts to a claim that all changes in our biosphere occur via processes which we can observe at work in the world today. Given that all of these changes have occurred within the last few thousand or the last couple of tens of thousands of years, then why has nothing resembling macroevolution ever been observed in recorded history? What is it which used to cause such changes which has simply been shut down and turned off in our own age of the world?