That's a pretty silly statement. There is scientific evidence for a lot of things you can't witness, see, pinch, etc. Ever pinch an electron? The list is long, but I suspect it would be a waste of time. Your statement suggests you are a CS/ID type whose mind is already made up, and whose goal is to try to discredit or destroy science and the scientific method. If I'm wrong, please correct me, but that's the way it seems from your comment.
However, I believe in evolution to a certain extent. I believe each creature changes to some extent, but that each remains what it is. Just like the ring species, they changed but they are still salamanders. I like science, it's fascinating and there are many things it has done to help shape our life. There are many in the history of science that have made claims only to be refuted by others or a new discovery that shows their idea was wrong. No one is perfect. Science in it self is an evolutionary process, but science will always be science.