Evolution is totally independent of the theory of evolution. I f another theory came along to replace the theory of evolution, it would have to explain the facts at least as well as Darwin's theory has done for the last 150 years. No such replacement has ever been produced. Again, even if the theory were to collapse, that would still not magically disprove evolution or cause species to cease evolving. What it is not E volution is not about the origins of life on Earth.
Evolution is about the development of living things over time.
E volution is not about the Big Bang theory, nor the formation of the Sun and Earth. These are subjects for cosmology, not biology. Some creationist websites like to put up list of supposedly tricky questions for evolutionists - if you read them carefully you often find lots of questions that actually have nothing at all to do with biological evolution. Mutations may indeed be random events, but whether or not they remain in the gene pool is certainly not random, as it depends on how those genes affect the creature's survival in the environment. It works as a positive feedback loop.