Yes, the evolution of Life is about as obvious a fact as you could want. Although Darwin and Mendel and Watson were the great geniuses who brought our understanding to its zenith, the fact (if not the mechanism) of evolution was known at least as early as the ancient Greeks. Just a simple thought experiment will suffice to show how obvious it is. We know for certain that in earlier ages, say for example the Cambrian, most current species didn't exist, and the ones that did exist were vastly different from any we see today. Therefore -- unless you believe in new species just magically popping into existence or arriving on flying saucers hundreds of thousands of times at least (and if you do believe that, no one can help you) -- they must have evolved. It's also obvious in another way: We know that genes mutate. We know that mutations are passed on to offspring. We know that a few mutations are beneficial and not only are passed on, but become widespread. Therefore we know that species evolve (change) over time.