I realize this thread is not about evolution (in a way), but you mentioned Darwin and evidence of the theory of evolution, so I'll say that the scientific opinion of whatever is called evidence is rather regularly changing as to the perception of what the evidence is said to mean.
For instance, as I was reviewing the information or "evidence" of what evolutionists say about humans closest common ancester, I came across this comment by a scientist:
"There appears to be a decrease in overall body size within our lineage, rather than size simply staying the same or getting bigger with time, which
goes against how we generally think about evolution," Grabowski said." (Taken from
New study suggests that last common ancestor of humans and apes was smaller than thought)
So -- as far as fitting the evidence in with the theory, it is clear that scientists review the evidence as changing perception (ideas) as to its relevance to the application of the theory. So, while Charles Darwin formed a theory of progression of life as he understood it, based on what he observed, the evidence and scientific opinions as to how it relates to the theory changes. Therefore, and in any case, according to science, it really and simply cannot be proved.
So far I see no (verifiable) evidence that the theory of evolution and natural selection as far as progression or continuation of life forms is true, although I can see that if a person believes in the theory, it can easily be made to say that a fossil or similar discovery or thought fits in with that theory. I used to believe it. I used to believe almost anything scientists said because they were the scientists and would know what they were talking about.