A theory has to be proven. A theory can be something interesting; however, it is not necessarily true by its very nature.
Yes, true.
A theory is as valuable in accordance with how much it explains.
I do not count miraculous explanations as a theory. Saying "and then a miracle happened" is not a theory. It is an article of faith.
Articles of faith have a different sort of validity, but are not science.
Nothing in science is ever "proven". A scientific theory needs to be tested (and the more tests it passes, the better) -- but, the best that can be said about any theory is that it's "not yet disproven" (or falsified). It's a subtle; but, very important distinction.
A scientific theory must be capable of being falsified. The Theory of Evolution can be falsified (Darwin even stated ways that could be done) -- therefore it's a scientific theory. It's considered a rigorous theory, because it has survived many attempts to disprove it. It will never be considered proven.
OTOH, as a counter-example, the "theory" of anthropogenic climate change cannot be falsified -- therefore, it is most certainly not a scientific theory.
>>A theory has to be proven. <<
No it doesn’t. Thanks for telling everyone how ignorant you are.
You must be one of the people who think a “theory” is a “guess” all growed up.
it isn’t.