If evolution is a theory (your word), when will it becoe fact? I have yet to see evidence of any animal, insect, whatever, turning into another kind of animal, insect, whatever. You would think that with all the millions of kind of “things” in the world, at least one would be a half/half type thing. Is there any evidence of this that I do not know about?
That is a good question, but requires a detailed answer.
First, evolution is both a fact and a theory. It is a fact in that change is known to occur from generation to generation. You, for example, are not identical to either of your parents, nor to any of your grandparents. That is change in the genome over time -- evolution as a fact.
The theory of evolution seeks to explain millions and millions of facts, such as the difference between you and your parents. And the differences which have accumulated over hundreds of millions of years in multiple genomes.
The theory of evolution will never graduate from "theory" to "fact" -- science simply does not work that way. Theories explain facts! As Heinlein noted:
You should perhaps study scientific terminology, as that might help in these threads. I have posted a long list of definitions, as they are generally used in science, on my FR home page. It is a long list, so I will let you check it out there rather than posting it here.Piling up facts is not science--science is facts-and-theories. Facts alone have limited use and lack meaning: a valid theory organizes them into far greater usefulness.
A powerful theory not only embraces old facts and new but also discloses unsuspected facts.
Expanded Universe: The New Worlds of Robert A. Heinlein, 1980, pp. 480-481
Another problem with your question is the assumption that one "kind" of animal etc. turns into another "kind" of animal etc. in one generation. That is not likely under the current theory of evolution. In fact, that kind of change would be absolutely against the current theory of evolution.
Mutations build up slowly, and in many directions at once. When the environment changes, some indivuals in a population are better suited than others, and so reproduce slightly more efficiently (i.e, more of their descendants survive and carry on their genes). Over time those changes in the genome result in speciation.
If you want to see some modern examples of speciation, google "ring species" and you can see populations diverging until they can no longer interbreed--but still retaining all intermediate (transitional) populations.
You ask, "Is there any evidence of this that I do not know about?" The evidence for evolution occupies several floors on most major university libraries as well as the basements of some of our largest museums.
I am not sure how much of this evidence you are familiar with. From your post, I would guess you are on the creationist side of things. But the theory of evolution really is on a sound footing. It has been challenged by religious belief since it was published in 1859, and has become stronger and stronger with each challenge and with each new discovery.