Scientific activity is the only one which is obviously and undoubtedly cumulative and progressive.
This is a good time to look into our past and compare it with our present. As you do so, the Progress that our science has made in the past decade will become obvious. Our science and methodologies are becoming better and better. One study after another supports the findings of previous studies. Some of what we now have established as fact, is outlined in the discussion in the current Abstracts, by Richard Aghababian.