Interestingly enough, the theory rests upon nothing that is actually known. There is quite a lot known about gravity according the the Theory of Gravity. While the Theory of Electromagnetism isn't perfect (dual nature particle and waveform), a lot about light is known about how it behaves. In contrast, about evolution nothing is actually known. Oh, sure there is speculation that somthing is going on, but how that something is occuring nobody knows.
As I've mentioned before, there's an infinite difference between theories about physical laws of the universe that don't change (or the rate of change itself is a physical law) and what is tautologically touted as the Theory of Evolution As Fact.
The Bible says every hair on our head is numbered, i.e., DNA.
Look, flipping a nickle 1000 times in a row and coming up heads is monumentally improbable, but if it happens then the possibility of that happening is 100%. Now for that to happen again would be even more remote of a probability, but if it does happen again, the possibility of it happening again would be 100%. Just because each of the components and physical constants of the universe in and of themselves have a higly improbable likelyhood of occuring, the fact they they all did simultaneously assemeble together into this universe means that the possibility of a universe constructed in the way it is is 100%.
The argument can be made that there are several physical constants which have to be precisely what they are, and that very tiny deviations in any one of them would make the physical universe as we know it impossible, and hence we wouldn't be here to wonder about it.
The counter argument often proposed, and which I assumed you were making in the paragraph above, is that the universe is here, and we are wondering about it. Therefore, the "possibility" of all of those physical constants being exactly the way they are, is 100%.
That argument doesn't hold water.
The point is this. If physical constants could have a nearly infinite range of values, then the likelyhood that they would all be precisely as they are, is very small. (1000 x 2 heads on your nickel flip is much more likely). There arelimitless combinatitions that won't work, and one (so far as we know) extremely unlikely combination of things that does work.
So, either there is a very large number of universes, making it more likely that a very improbable convergence could occur, or
Our universe won the mother of all lotteries, or
Our universe is the product of intelligent design.
Assuming an infinite number of universes = faith. Infinity is only a concept, and so far as we know, there is nothing that exists in an infinite amount.
Assuming the mother of all lotteries = faith. We see the lottery being won. But the odds on this one are so small, that it would be concidered an impossibility if the topic were anything else.
Assuming Intelligent design = faith. BUT, we see a HUGE amount of provable intelligence and design in the world around us. Intelligent Design most certainly exists, in great abundance.
Of the three, which Faith is the most reasonable?