Please read this: http://chem.tufts.edu/answersinscience/relativityofwrong.htm

Unfortunately, rationalism is needed to prove rationalism, and once science is "accepted fact" and we all accept things like "round", "sphere", and "Earth" then we assume we have made progress.

But, there is not a single fact that could not be disproved by more evidence. Even "the Earth is round" could be proven to be wrong and we consider it part amorphous-hyperconical-hypertubular in the future, or perhaps we prove scientifically that we live in a simulation/a game and the universe, shapes, Earth, etc. is a simple allusion, comparable to the blocky pixel graphics in old Atari 2600 games.

Please read this: http://en.wikipedia.org/wiki/Simulation_hypothesis

While it is certainly possible that we understand one or more eternal truths that span all that exists in every dimension and every universe, considering the age, maturity, and abilities of the human race, it is extremely doubtful that we have made much progress or that we ever will. Science is great when approached from the standpoint of wonder and discovery, but it is terrible when it comes to "truth". Don't believe me? There is a whole religion devoted to the belief system that many are infected or affected by aliens (Scientology); many accept that this faith is based on a science fiction novel a.k.a. fiction, but many believe it is true. In the same way, many are convinced that science has elucidated truths, even though we don't know that it has or ever will. Yet, you accept science as truth in part. That is an irrational belief because the only way to accept it as rational is to have faith that it is rational. Rationalism is nothing without faith, but faith exists without rationalism.